# Primitive Type i128

1.26.0 ·## Expand description

The 128-bit signed integer type.

## Implementations§

source§### impl i128

### impl i128

1.0.0 (const: 1.32.0) · source#### pub const fn count_ones(self) -> u32

#### pub const fn count_ones(self) -> u32

1.0.0 (const: 1.32.0) · source#### pub const fn count_zeros(self) -> u32

#### pub const fn count_zeros(self) -> u32

1.0.0 (const: 1.32.0) · source#### pub const fn leading_zeros(self) -> u32

#### pub const fn leading_zeros(self) -> u32

Returns the number of leading zeros in the binary representation of `self`

.

Depending on what you’re doing with the value, you might also be interested in the
`ilog2`

function which returns a consistent number, even if the type widens.

##### §Examples

Basic usage:

```
let n = -1i128;
assert_eq!(n.leading_zeros(), 0);
```

Run1.0.0 (const: 1.32.0) · source#### pub const fn trailing_zeros(self) -> u32

#### pub const fn trailing_zeros(self) -> u32

1.46.0 (const: 1.46.0) · source#### pub const fn leading_ones(self) -> u32

#### pub const fn leading_ones(self) -> u32

1.46.0 (const: 1.46.0) · source#### pub const fn trailing_ones(self) -> u32

#### pub const fn trailing_ones(self) -> u32

1.0.0 (const: 1.32.0) · source#### pub const fn rotate_left(self, n: u32) -> Self

#### pub const fn rotate_left(self, n: u32) -> Self

Shifts the bits to the left by a specified amount, `n`

,
wrapping the truncated bits to the end of the resulting integer.

Please note this isn’t the same operation as the `<<`

shifting operator!

##### §Examples

Basic usage:

```
let n = 0x13f40000000000000000000000004f76i128;
let m = 0x4f7613f4;
assert_eq!(n.rotate_left(16), m);
```

Run1.0.0 (const: 1.32.0) · source#### pub const fn rotate_right(self, n: u32) -> Self

#### pub const fn rotate_right(self, n: u32) -> Self

Shifts the bits to the right by a specified amount, `n`

,
wrapping the truncated bits to the beginning of the resulting
integer.

Please note this isn’t the same operation as the `>>`

shifting operator!

##### §Examples

Basic usage:

```
let n = 0x4f7613f4i128;
let m = 0x13f40000000000000000000000004f76;
assert_eq!(n.rotate_right(16), m);
```

Run1.0.0 (const: 1.32.0) · source#### pub const fn swap_bytes(self) -> Self

#### pub const fn swap_bytes(self) -> Self

1.37.0 (const: 1.37.0) · source#### pub const fn reverse_bits(self) -> Self

#### pub const fn reverse_bits(self) -> Self

Reverses the order of bits in the integer. The least significant bit becomes the most significant bit, second least-significant bit becomes second most-significant bit, etc.

##### §Examples

Basic usage:

```
let n = 0x12345678901234567890123456789012i128;
let m = n.reverse_bits();
assert_eq!(m, 0x48091e6a2c48091e6a2c48091e6a2c48);
assert_eq!(0, 0i128.reverse_bits());
```

Run1.0.0 (const: 1.32.0) · source#### pub const fn from_le(x: Self) -> Self

#### pub const fn from_le(x: Self) -> Self

Converts an integer from little endian to the target’s endianness.

On little endian this is a no-op. On big endian the bytes are swapped.

##### §Examples

Basic usage:

```
let n = 0x1Ai128;
if cfg!(target_endian = "little") {
assert_eq!(i128::from_le(n), n)
} else {
assert_eq!(i128::from_le(n), n.swap_bytes())
}
```

Run1.0.0 (const: 1.47.0) · source#### pub const fn checked_add(self, rhs: Self) -> Option<Self>

#### pub const fn checked_add(self, rhs: Self) -> Option<Self>

const: unstable · source#### pub fn strict_add(self, rhs: Self) -> Self

🔬This is a nightly-only experimental API. (`strict_overflow_ops`

#118260)

#### pub fn strict_add(self, rhs: Self) -> Self

`strict_overflow_ops`

#118260)Strict integer addition. Computes `self + rhs`

, panicking
if overflow occurred.

##### §Panics

###### §Overflow behavior

This function will always panic on overflow, regardless of whether overflow checks are enabled.

##### §Examples

Basic usage:

```
#![feature(strict_overflow_ops)]
assert_eq!((i128::MAX - 2).strict_add(1), i128::MAX - 1);
```

RunThe following panics because of overflow:

1.79.0 (const: 1.79.0) · source#### pub const unsafe fn unchecked_add(self, rhs: Self) -> Self

#### pub const unsafe fn unchecked_add(self, rhs: Self) -> Self

Unchecked integer addition. Computes `self + rhs`

, assuming overflow
cannot occur.

Calling `x.unchecked_add(y)`

is semantically equivalent to calling
`x.`

`checked_add`

`(y).`

`unwrap_unchecked`

`()`

.

If you’re just trying to avoid the panic in debug mode, then **do not**
use this. Instead, you’re looking for `wrapping_add`

.

##### §Safety

This results in undefined behavior when
`self + rhs > i128::MAX`

or `self + rhs < i128::MIN`

,
i.e. when `checked_add`

would return `None`

.

1.66.0 (const: 1.66.0) · source#### pub const fn checked_add_unsigned(self, rhs: u128) -> Option<Self>

#### pub const fn checked_add_unsigned(self, rhs: u128) -> Option<Self>

const: unstable · source#### pub fn strict_add_unsigned(self, rhs: u128) -> Self

🔬This is a nightly-only experimental API. (`strict_overflow_ops`

#118260)

#### pub fn strict_add_unsigned(self, rhs: u128) -> Self

`strict_overflow_ops`

#118260)Strict addition with an unsigned integer. Computes `self + rhs`

,
panicking if overflow occurred.

##### §Panics

###### §Overflow behavior

This function will always panic on overflow, regardless of whether overflow checks are enabled.

##### §Examples

Basic usage:

```
#![feature(strict_overflow_ops)]
assert_eq!(1i128.strict_add_unsigned(2), 3);
```

RunThe following panics because of overflow:

1.0.0 (const: 1.47.0) · source#### pub const fn checked_sub(self, rhs: Self) -> Option<Self>

#### pub const fn checked_sub(self, rhs: Self) -> Option<Self>

const: unstable · source#### pub fn strict_sub(self, rhs: Self) -> Self

🔬This is a nightly-only experimental API. (`strict_overflow_ops`

#118260)

#### pub fn strict_sub(self, rhs: Self) -> Self

`strict_overflow_ops`

#118260)Strict integer subtraction. Computes `self - rhs`

, panicking if
overflow occurred.

##### §Panics

###### §Overflow behavior

This function will always panic on overflow, regardless of whether overflow checks are enabled.

##### §Examples

Basic usage:

```
#![feature(strict_overflow_ops)]
assert_eq!((i128::MIN + 2).strict_sub(1), i128::MIN + 1);
```

RunThe following panics because of overflow:

1.79.0 (const: 1.79.0) · source#### pub const unsafe fn unchecked_sub(self, rhs: Self) -> Self

#### pub const unsafe fn unchecked_sub(self, rhs: Self) -> Self

Unchecked integer subtraction. Computes `self - rhs`

, assuming overflow
cannot occur.

Calling `x.unchecked_sub(y)`

is semantically equivalent to calling
`x.`

`checked_sub`

`(y).`

`unwrap_unchecked`

`()`

.

If you’re just trying to avoid the panic in debug mode, then **do not**
use this. Instead, you’re looking for `wrapping_sub`

.

##### §Safety

This results in undefined behavior when
`self - rhs > i128::MAX`

or `self - rhs < i128::MIN`

,
i.e. when `checked_sub`

would return `None`

.

1.66.0 (const: 1.66.0) · source#### pub const fn checked_sub_unsigned(self, rhs: u128) -> Option<Self>

#### pub const fn checked_sub_unsigned(self, rhs: u128) -> Option<Self>

const: unstable · source#### pub fn strict_sub_unsigned(self, rhs: u128) -> Self

🔬This is a nightly-only experimental API. (`strict_overflow_ops`

#118260)

#### pub fn strict_sub_unsigned(self, rhs: u128) -> Self

`strict_overflow_ops`

#118260)Strict subtraction with an unsigned integer. Computes `self - rhs`

,
panicking if overflow occurred.

##### §Panics

###### §Overflow behavior

This function will always panic on overflow, regardless of whether overflow checks are enabled.

##### §Examples

Basic usage:

```
#![feature(strict_overflow_ops)]
assert_eq!(1i128.strict_sub_unsigned(2), -1);
```

RunThe following panics because of overflow:

1.0.0 (const: 1.47.0) · source#### pub const fn checked_mul(self, rhs: Self) -> Option<Self>

#### pub const fn checked_mul(self, rhs: Self) -> Option<Self>

const: unstable · source#### pub fn strict_mul(self, rhs: Self) -> Self

🔬This is a nightly-only experimental API. (`strict_overflow_ops`

#118260)

#### pub fn strict_mul(self, rhs: Self) -> Self

`strict_overflow_ops`

#118260)Strict integer multiplication. Computes `self * rhs`

, panicking if
overflow occurred.

##### §Panics

###### §Overflow behavior

This function will always panic on overflow, regardless of whether overflow checks are enabled.

##### §Examples

Basic usage:

```
#![feature(strict_overflow_ops)]
assert_eq!(i128::MAX.strict_mul(1), i128::MAX);
```

RunThe following panics because of overflow:

1.79.0 (const: 1.79.0) · source#### pub const unsafe fn unchecked_mul(self, rhs: Self) -> Self

#### pub const unsafe fn unchecked_mul(self, rhs: Self) -> Self

Unchecked integer multiplication. Computes `self * rhs`

, assuming overflow
cannot occur.

Calling `x.unchecked_mul(y)`

is semantically equivalent to calling
`x.`

`checked_mul`

`(y).`

`unwrap_unchecked`

`()`

.

If you’re just trying to avoid the panic in debug mode, then **do not**
use this. Instead, you’re looking for `wrapping_mul`

.

##### §Safety

This results in undefined behavior when
`self * rhs > i128::MAX`

or `self * rhs < i128::MIN`

,
i.e. when `checked_mul`

would return `None`

.

1.0.0 (const: 1.52.0) · source#### pub const fn checked_div(self, rhs: Self) -> Option<Self>

#### pub const fn checked_div(self, rhs: Self) -> Option<Self>

Checked integer division. Computes `self / rhs`

, returning `None`

if `rhs == 0`

or the division results in overflow.

##### §Examples

Basic usage:

```
assert_eq!((i128::MIN + 1).checked_div(-1), Some(170141183460469231731687303715884105727));
assert_eq!(i128::MIN.checked_div(-1), None);
assert_eq!((1i128).checked_div(0), None);
```

Runconst: unstable · source#### pub fn strict_div(self, rhs: Self) -> Self

🔬This is a nightly-only experimental API. (`strict_overflow_ops`

#118260)

#### pub fn strict_div(self, rhs: Self) -> Self

`strict_overflow_ops`

#118260)Strict integer division. Computes `self / rhs`

, panicking
if overflow occurred.

##### §Panics

This function will panic if `rhs`

is zero.

###### §Overflow behavior

This function will always panic on overflow, regardless of whether overflow checks are enabled.

The only case where such an overflow can occur is when one divides `MIN / -1`

on a signed type (where
`MIN`

is the negative minimal value for the type); this is equivalent to `-MIN`

, a positive value
that is too large to represent in the type.

##### §Examples

Basic usage:

```
#![feature(strict_overflow_ops)]
assert_eq!((i128::MIN + 1).strict_div(-1), 170141183460469231731687303715884105727);
```

RunThe following panics because of overflow:

The following panics because of division by zero:

1.38.0 (const: 1.52.0) · source#### pub const fn checked_div_euclid(self, rhs: Self) -> Option<Self>

#### pub const fn checked_div_euclid(self, rhs: Self) -> Option<Self>

Checked Euclidean division. Computes `self.div_euclid(rhs)`

,
returning `None`

if `rhs == 0`

or the division results in overflow.

##### §Examples

Basic usage:

```
assert_eq!((i128::MIN + 1).checked_div_euclid(-1), Some(170141183460469231731687303715884105727));
assert_eq!(i128::MIN.checked_div_euclid(-1), None);
assert_eq!((1i128).checked_div_euclid(0), None);
```

Runconst: unstable · source#### pub fn strict_div_euclid(self, rhs: Self) -> Self

🔬This is a nightly-only experimental API. (`strict_overflow_ops`

#118260)

#### pub fn strict_div_euclid(self, rhs: Self) -> Self

`strict_overflow_ops`

#118260)Strict Euclidean division. Computes `self.div_euclid(rhs)`

, panicking
if overflow occurred.

##### §Panics

This function will panic if `rhs`

is zero.

###### §Overflow behavior

This function will always panic on overflow, regardless of whether overflow checks are enabled.

The only case where such an overflow can occur is when one divides `MIN / -1`

on a signed type (where
`MIN`

is the negative minimal value for the type); this is equivalent to `-MIN`

, a positive value
that is too large to represent in the type.

##### §Examples

Basic usage:

```
#![feature(strict_overflow_ops)]
assert_eq!((i128::MIN + 1).strict_div_euclid(-1), 170141183460469231731687303715884105727);
```

RunThe following panics because of overflow:

The following panics because of division by zero:

1.7.0 (const: 1.52.0) · source#### pub const fn checked_rem(self, rhs: Self) -> Option<Self>

#### pub const fn checked_rem(self, rhs: Self) -> Option<Self>

const: unstable · source#### pub fn strict_rem(self, rhs: Self) -> Self

🔬This is a nightly-only experimental API. (`strict_overflow_ops`

#118260)

#### pub fn strict_rem(self, rhs: Self) -> Self

`strict_overflow_ops`

#118260)Strict integer remainder. Computes `self % rhs`

, panicking if
the division results in overflow.

##### §Panics

This function will panic if `rhs`

is zero.

###### §Overflow behavior

This function will always panic on overflow, regardless of whether overflow checks are enabled.

The only case where such an overflow can occur is `x % y`

for `MIN / -1`

on a
signed type (where `MIN`

is the negative minimal value), which is invalid due to implementation artifacts.

##### §Examples

Basic usage:

```
#![feature(strict_overflow_ops)]
assert_eq!(5i128.strict_rem(2), 1);
```

RunThe following panics because of division by zero:

The following panics because of overflow:

1.38.0 (const: 1.52.0) · source#### pub const fn checked_rem_euclid(self, rhs: Self) -> Option<Self>

#### pub const fn checked_rem_euclid(self, rhs: Self) -> Option<Self>

const: unstable · source#### pub fn strict_rem_euclid(self, rhs: Self) -> Self

🔬This is a nightly-only experimental API. (`strict_overflow_ops`

#118260)

#### pub fn strict_rem_euclid(self, rhs: Self) -> Self

`strict_overflow_ops`

#118260)Strict Euclidean remainder. Computes `self.rem_euclid(rhs)`

, panicking if
the division results in overflow.

##### §Panics

This function will panic if `rhs`

is zero.

###### §Overflow behavior

This function will always panic on overflow, regardless of whether overflow checks are enabled.

The only case where such an overflow can occur is `x % y`

for `MIN / -1`

on a
signed type (where `MIN`

is the negative minimal value), which is invalid due to implementation artifacts.

##### §Examples

Basic usage:

```
#![feature(strict_overflow_ops)]
assert_eq!(5i128.strict_rem_euclid(2), 1);
```

RunThe following panics because of division by zero:

The following panics because of overflow:

1.7.0 (const: 1.47.0) · source#### pub const fn checked_neg(self) -> Option<Self>

#### pub const fn checked_neg(self) -> Option<Self>

const: unstable · source#### pub unsafe fn unchecked_neg(self) -> Self

🔬This is a nightly-only experimental API. (`unchecked_neg`

#85122)

#### pub unsafe fn unchecked_neg(self) -> Self

`unchecked_neg`

#85122)Unchecked negation. Computes `-self`

, assuming overflow cannot occur.

##### §Safety

This results in undefined behavior when
`self == i128::MIN`

,
i.e. when `checked_neg`

would return `None`

.

const: unstable · source#### pub fn strict_neg(self) -> Self

🔬This is a nightly-only experimental API. (`strict_overflow_ops`

#118260)

#### pub fn strict_neg(self) -> Self

`strict_overflow_ops`

#118260)Strict negation. Computes `-self`

, panicking if `self == MIN`

.

##### §Panics

###### §Overflow behavior

This function will always panic on overflow, regardless of whether overflow checks are enabled.

##### §Examples

Basic usage:

```
#![feature(strict_overflow_ops)]
assert_eq!(5i128.strict_neg(), -5);
```

RunThe following panics because of overflow:

1.7.0 (const: 1.47.0) · source#### pub const fn checked_shl(self, rhs: u32) -> Option<Self>

#### pub const fn checked_shl(self, rhs: u32) -> Option<Self>

const: unstable · source#### pub fn strict_shl(self, rhs: u32) -> Self

🔬This is a nightly-only experimental API. (`strict_overflow_ops`

#118260)

#### pub fn strict_shl(self, rhs: u32) -> Self

`strict_overflow_ops`

#118260)Strict shift left. Computes `self << rhs`

, panicking if `rhs`

is larger
than or equal to the number of bits in `self`

.

##### §Panics

###### §Overflow behavior

This function will always panic on overflow, regardless of whether overflow checks are enabled.

##### §Examples

Basic usage:

```
#![feature(strict_overflow_ops)]
assert_eq!(0x1i128.strict_shl(4), 0x10);
```

RunThe following panics because of overflow:

const: unstable · source#### pub unsafe fn unchecked_shl(self, rhs: u32) -> Self

🔬This is a nightly-only experimental API. (`unchecked_shifts`

#85122)

#### pub unsafe fn unchecked_shl(self, rhs: u32) -> Self

`unchecked_shifts`

#85122)Unchecked shift left. Computes `self << rhs`

, assuming that
`rhs`

is less than the number of bits in `self`

.

##### §Safety

This results in undefined behavior if `rhs`

is larger than
or equal to the number of bits in `self`

,
i.e. when `checked_shl`

would return `None`

.

1.7.0 (const: 1.47.0) · source#### pub const fn checked_shr(self, rhs: u32) -> Option<Self>

#### pub const fn checked_shr(self, rhs: u32) -> Option<Self>

const: unstable · source#### pub fn strict_shr(self, rhs: u32) -> Self

🔬This is a nightly-only experimental API. (`strict_overflow_ops`

#118260)

#### pub fn strict_shr(self, rhs: u32) -> Self

`strict_overflow_ops`

#118260)Strict shift right. Computes `self >> rhs`

, panicking `rhs`

is
larger than or equal to the number of bits in `self`

.

##### §Panics

###### §Overflow behavior

This function will always panic on overflow, regardless of whether overflow checks are enabled.

##### §Examples

Basic usage:

```
#![feature(strict_overflow_ops)]
assert_eq!(0x10i128.strict_shr(4), 0x1);
```

RunThe following panics because of overflow:

const: unstable · source#### pub unsafe fn unchecked_shr(self, rhs: u32) -> Self

🔬This is a nightly-only experimental API. (`unchecked_shifts`

#85122)

#### pub unsafe fn unchecked_shr(self, rhs: u32) -> Self

`unchecked_shifts`

#85122)Unchecked shift right. Computes `self >> rhs`

, assuming that
`rhs`

is less than the number of bits in `self`

.

##### §Safety

This results in undefined behavior if `rhs`

is larger than
or equal to the number of bits in `self`

,
i.e. when `checked_shr`

would return `None`

.

1.13.0 (const: 1.47.0) · source#### pub const fn checked_abs(self) -> Option<Self>

#### pub const fn checked_abs(self) -> Option<Self>

const: unstable · source#### pub fn strict_abs(self) -> Self

🔬This is a nightly-only experimental API. (`strict_overflow_ops`

#118260)

#### pub fn strict_abs(self) -> Self

`strict_overflow_ops`

#118260)Strict absolute value. Computes `self.abs()`

, panicking if
`self == MIN`

.

##### §Panics

###### §Overflow behavior

This function will always panic on overflow, regardless of whether overflow checks are enabled.

##### §Examples

Basic usage:

```
#![feature(strict_overflow_ops)]
assert_eq!((-5i128).strict_abs(), 5);
```

RunThe following panics because of overflow:

1.34.0 (const: 1.50.0) · source#### pub const fn checked_pow(self, exp: u32) -> Option<Self>

#### pub const fn checked_pow(self, exp: u32) -> Option<Self>

const: unstable · source#### pub fn strict_pow(self, exp: u32) -> Self

🔬This is a nightly-only experimental API. (`strict_overflow_ops`

#118260)

#### pub fn strict_pow(self, exp: u32) -> Self

`strict_overflow_ops`

#118260)Strict exponentiation. Computes `self.pow(exp)`

, panicking if
overflow occurred.

##### §Panics

###### §Overflow behavior

This function will always panic on overflow, regardless of whether overflow checks are enabled.

##### §Examples

Basic usage:

```
#![feature(strict_overflow_ops)]
assert_eq!(8i128.strict_pow(2), 64);
```

RunThe following panics because of overflow:

const: unstable · source#### pub fn checked_isqrt(self) -> Option<Self>

🔬This is a nightly-only experimental API. (`isqrt`

#116226)

#### pub fn checked_isqrt(self) -> Option<Self>

`isqrt`

#116226)1.0.0 (const: 1.47.0) · source#### pub const fn saturating_add(self, rhs: Self) -> Self

#### pub const fn saturating_add(self, rhs: Self) -> Self

1.66.0 (const: 1.66.0) · source#### pub const fn saturating_add_unsigned(self, rhs: u128) -> Self

#### pub const fn saturating_add_unsigned(self, rhs: u128) -> Self

1.0.0 (const: 1.47.0) · source#### pub const fn saturating_sub(self, rhs: Self) -> Self

#### pub const fn saturating_sub(self, rhs: Self) -> Self

1.66.0 (const: 1.66.0) · source#### pub const fn saturating_sub_unsigned(self, rhs: u128) -> Self

#### pub const fn saturating_sub_unsigned(self, rhs: u128) -> Self

1.45.0 (const: 1.47.0) · source#### pub const fn saturating_neg(self) -> Self

#### pub const fn saturating_neg(self) -> Self

Saturating integer negation. Computes `-self`

, returning `MAX`

if `self == MIN`

instead of overflowing.

##### §Examples

Basic usage:

```
assert_eq!(100i128.saturating_neg(), -100);
assert_eq!((-100i128).saturating_neg(), 100);
assert_eq!(i128::MIN.saturating_neg(), i128::MAX);
assert_eq!(i128::MAX.saturating_neg(), i128::MIN + 1);
```

Run1.45.0 (const: 1.47.0) · source#### pub const fn saturating_abs(self) -> Self

#### pub const fn saturating_abs(self) -> Self

Saturating absolute value. Computes `self.abs()`

, returning `MAX`

if `self == MIN`

instead of overflowing.

##### §Examples

Basic usage:

```
assert_eq!(100i128.saturating_abs(), 100);
assert_eq!((-100i128).saturating_abs(), 100);
assert_eq!(i128::MIN.saturating_abs(), i128::MAX);
assert_eq!((i128::MIN + 1).saturating_abs(), i128::MAX);
```

Run1.7.0 (const: 1.47.0) · source#### pub const fn saturating_mul(self, rhs: Self) -> Self

#### pub const fn saturating_mul(self, rhs: Self) -> Self

1.58.0 (const: 1.58.0) · source#### pub const fn saturating_div(self, rhs: Self) -> Self

#### pub const fn saturating_div(self, rhs: Self) -> Self

Saturating integer division. Computes `self / rhs`

, saturating at the
numeric bounds instead of overflowing.

##### §Panics

This function will panic if `rhs`

is 0.

##### §Examples

Basic usage:

```
assert_eq!(5i128.saturating_div(2), 2);
assert_eq!(i128::MAX.saturating_div(-1), i128::MIN + 1);
assert_eq!(i128::MIN.saturating_div(-1), i128::MAX);
```

Run1.34.0 (const: 1.50.0) · source#### pub const fn saturating_pow(self, exp: u32) -> Self

#### pub const fn saturating_pow(self, exp: u32) -> Self

1.0.0 (const: 1.32.0) · source#### pub const fn wrapping_add(self, rhs: Self) -> Self

#### pub const fn wrapping_add(self, rhs: Self) -> Self

1.66.0 (const: 1.66.0) · source#### pub const fn wrapping_add_unsigned(self, rhs: u128) -> Self

#### pub const fn wrapping_add_unsigned(self, rhs: u128) -> Self

1.0.0 (const: 1.32.0) · source#### pub const fn wrapping_sub(self, rhs: Self) -> Self

#### pub const fn wrapping_sub(self, rhs: Self) -> Self

1.66.0 (const: 1.66.0) · source#### pub const fn wrapping_sub_unsigned(self, rhs: u128) -> Self

#### pub const fn wrapping_sub_unsigned(self, rhs: u128) -> Self

1.0.0 (const: 1.32.0) · source#### pub const fn wrapping_mul(self, rhs: Self) -> Self

#### pub const fn wrapping_mul(self, rhs: Self) -> Self

1.2.0 (const: 1.52.0) · source#### pub const fn wrapping_div(self, rhs: Self) -> Self

#### pub const fn wrapping_div(self, rhs: Self) -> Self

Wrapping (modular) division. Computes `self / rhs`

, wrapping around at the
boundary of the type.

The only case where such wrapping can occur is when one divides `MIN / -1`

on a signed type (where
`MIN`

is the negative minimal value for the type); this is equivalent to `-MIN`

, a positive value
that is too large to represent in the type. In such a case, this function returns `MIN`

itself.

##### §Panics

This function will panic if `rhs`

is 0.

##### §Examples

Basic usage:

```
assert_eq!(100i128.wrapping_div(10), 10);
assert_eq!((-128i8).wrapping_div(-1), -128);
```

Run1.38.0 (const: 1.52.0) · source#### pub const fn wrapping_div_euclid(self, rhs: Self) -> Self

#### pub const fn wrapping_div_euclid(self, rhs: Self) -> Self

Wrapping Euclidean division. Computes `self.div_euclid(rhs)`

,
wrapping around at the boundary of the type.

Wrapping will only occur in `MIN / -1`

on a signed type (where `MIN`

is the negative minimal value
for the type). This is equivalent to `-MIN`

, a positive value that is too large to represent in the
type. In this case, this method returns `MIN`

itself.

##### §Panics

This function will panic if `rhs`

is 0.

##### §Examples

Basic usage:

```
assert_eq!(100i128.wrapping_div_euclid(10), 10);
assert_eq!((-128i8).wrapping_div_euclid(-1), -128);
```

Run1.2.0 (const: 1.52.0) · source#### pub const fn wrapping_rem(self, rhs: Self) -> Self

#### pub const fn wrapping_rem(self, rhs: Self) -> Self

Wrapping (modular) remainder. Computes `self % rhs`

, wrapping around at the
boundary of the type.

Such wrap-around never actually occurs mathematically; implementation artifacts make `x % y`

invalid for `MIN / -1`

on a signed type (where `MIN`

is the negative minimal value). In such a case,
this function returns `0`

.

##### §Panics

This function will panic if `rhs`

is 0.

##### §Examples

Basic usage:

```
assert_eq!(100i128.wrapping_rem(10), 0);
assert_eq!((-128i8).wrapping_rem(-1), 0);
```

Run1.38.0 (const: 1.52.0) · source#### pub const fn wrapping_rem_euclid(self, rhs: Self) -> Self

#### pub const fn wrapping_rem_euclid(self, rhs: Self) -> Self

Wrapping Euclidean remainder. Computes `self.rem_euclid(rhs)`

, wrapping around
at the boundary of the type.

Wrapping will only occur in `MIN % -1`

on a signed type (where `MIN`

is the negative minimal value
for the type). In this case, this method returns 0.

##### §Panics

This function will panic if `rhs`

is 0.

##### §Examples

Basic usage:

```
assert_eq!(100i128.wrapping_rem_euclid(10), 0);
assert_eq!((-128i8).wrapping_rem_euclid(-1), 0);
```

Run1.2.0 (const: 1.32.0) · source#### pub const fn wrapping_neg(self) -> Self

#### pub const fn wrapping_neg(self) -> Self

Wrapping (modular) negation. Computes `-self`

, wrapping around at the boundary
of the type.

The only case where such wrapping can occur is when one negates `MIN`

on a signed type (where `MIN`

is the negative minimal value for the type); this is a positive value that is too large to represent
in the type. In such a case, this function returns `MIN`

itself.

##### §Examples

Basic usage:

```
assert_eq!(100i128.wrapping_neg(), -100);
assert_eq!(i128::MIN.wrapping_neg(), i128::MIN);
```

Run1.2.0 (const: 1.32.0) · source#### pub const fn wrapping_shl(self, rhs: u32) -> Self

#### pub const fn wrapping_shl(self, rhs: u32) -> Self

Panic-free bitwise shift-left; yields `self << mask(rhs)`

, where `mask`

removes
any high-order bits of `rhs`

that would cause the shift to exceed the bitwidth of the type.

Note that this is *not* the same as a rotate-left; the RHS of a wrapping shift-left is restricted to
the range of the type, rather than the bits shifted out of the LHS being returned to the other end.
The primitive integer types all implement a `rotate_left`

function,
which may be what you want instead.

##### §Examples

Basic usage:

```
assert_eq!((-1i128).wrapping_shl(7), -128);
assert_eq!((-1i128).wrapping_shl(128), -1);
```

Run1.2.0 (const: 1.32.0) · source#### pub const fn wrapping_shr(self, rhs: u32) -> Self

#### pub const fn wrapping_shr(self, rhs: u32) -> Self

Panic-free bitwise shift-right; yields `self >> mask(rhs)`

, where `mask`

removes any high-order bits of `rhs`

that would cause the shift to exceed the bitwidth of the type.

Note that this is *not* the same as a rotate-right; the RHS of a wrapping shift-right is restricted
to the range of the type, rather than the bits shifted out of the LHS being returned to the other
end. The primitive integer types all implement a `rotate_right`

function,
which may be what you want instead.

##### §Examples

Basic usage:

```
assert_eq!((-128i128).wrapping_shr(7), -1);
assert_eq!((-128i16).wrapping_shr(64), -128);
```

Run1.13.0 (const: 1.32.0) · source#### pub const fn wrapping_abs(self) -> Self

#### pub const fn wrapping_abs(self) -> Self

Wrapping (modular) absolute value. Computes `self.abs()`

, wrapping around at
the boundary of the type.

The only case where such wrapping can occur is when one takes the absolute value of the negative
minimal value for the type; this is a positive value that is too large to represent in the type. In
such a case, this function returns `MIN`

itself.

##### §Examples

Basic usage:

```
assert_eq!(100i128.wrapping_abs(), 100);
assert_eq!((-100i128).wrapping_abs(), 100);
assert_eq!(i128::MIN.wrapping_abs(), i128::MIN);
assert_eq!((-128i8).wrapping_abs() as u8, 128);
```

Run1.51.0 (const: 1.51.0) · source#### pub const fn unsigned_abs(self) -> u128

#### pub const fn unsigned_abs(self) -> u128

1.34.0 (const: 1.50.0) · source#### pub const fn wrapping_pow(self, exp: u32) -> Self

#### pub const fn wrapping_pow(self, exp: u32) -> Self

1.7.0 (const: 1.32.0) · source#### pub const fn overflowing_add(self, rhs: Self) -> (Self, bool)

#### pub const fn overflowing_add(self, rhs: Self) -> (Self, bool)

Calculates `self`

+ `rhs`

Returns a tuple of the addition along with a boolean indicating whether an arithmetic overflow would occur. If an overflow would have occurred then the wrapped value is returned.

##### §Examples

Basic usage:

```
assert_eq!(5i128.overflowing_add(2), (7, false));
assert_eq!(i128::MAX.overflowing_add(1), (i128::MIN, true));
```

Runconst: unstable · source#### pub fn carrying_add(self, rhs: Self, carry: bool) -> (Self, bool)

🔬This is a nightly-only experimental API. (`bigint_helper_methods`

#85532)

#### pub fn carrying_add(self, rhs: Self, carry: bool) -> (Self, bool)

`bigint_helper_methods`

#85532)Calculates `self`

+ `rhs`

+ `carry`

and checks for overflow.

Performs “ternary addition” of two integer operands and a carry-in bit, and returns a tuple of the sum along with a boolean indicating whether an arithmetic overflow would occur. On overflow, the wrapped value is returned.

This allows chaining together multiple additions to create a wider
addition, and can be useful for bignum addition. This method should
only be used for the most significant word; for the less significant
words the unsigned method
`u128::carrying_add`

should be used.

The output boolean returned by this method is *not* a carry flag,
and should *not* be added to a more significant word.

If the input carry is false, this method is equivalent to
`overflowing_add`

.

##### §Examples

```
#![feature(bigint_helper_methods)]
// Only the most significant word is signed.
//
// 10 MAX (a = 10 × 2^128 + 2^128 - 1)
// + -5 9 (b = -5 × 2^128 + 9)
// ---------
// 6 8 (sum = 6 × 2^128 + 8)
let (a1, a0): (i128, u128) = (10, u128::MAX);
let (b1, b0): (i128, u128) = (-5, 9);
let carry0 = false;
// u128::carrying_add for the less significant words
let (sum0, carry1) = a0.carrying_add(b0, carry0);
assert_eq!(carry1, true);
// i128::carrying_add for the most significant word
let (sum1, overflow) = a1.carrying_add(b1, carry1);
assert_eq!(overflow, false);
assert_eq!((sum1, sum0), (6, 8));
```

Run1.66.0 (const: 1.66.0) · source#### pub const fn overflowing_add_unsigned(self, rhs: u128) -> (Self, bool)

#### pub const fn overflowing_add_unsigned(self, rhs: u128) -> (Self, bool)

Calculates `self`

+ `rhs`

with an unsigned `rhs`

Returns a tuple of the addition along with a boolean indicating whether an arithmetic overflow would occur. If an overflow would have occurred then the wrapped value is returned.

##### §Examples

Basic usage:

```
assert_eq!(1i128.overflowing_add_unsigned(2), (3, false));
assert_eq!((i128::MIN).overflowing_add_unsigned(u128::MAX), (i128::MAX, false));
assert_eq!((i128::MAX - 2).overflowing_add_unsigned(3), (i128::MIN, true));
```

Run1.7.0 (const: 1.32.0) · source#### pub const fn overflowing_sub(self, rhs: Self) -> (Self, bool)

#### pub const fn overflowing_sub(self, rhs: Self) -> (Self, bool)

Calculates `self`

- `rhs`

Returns a tuple of the subtraction along with a boolean indicating whether an arithmetic overflow would occur. If an overflow would have occurred then the wrapped value is returned.

##### §Examples

Basic usage:

```
assert_eq!(5i128.overflowing_sub(2), (3, false));
assert_eq!(i128::MIN.overflowing_sub(1), (i128::MAX, true));
```

Runconst: unstable · source#### pub fn borrowing_sub(self, rhs: Self, borrow: bool) -> (Self, bool)

🔬This is a nightly-only experimental API. (`bigint_helper_methods`

#85532)

#### pub fn borrowing_sub(self, rhs: Self, borrow: bool) -> (Self, bool)

`bigint_helper_methods`

#85532)Calculates `self`

− `rhs`

− `borrow`

and checks for
overflow.

Performs “ternary subtraction” by subtracting both an integer
operand and a borrow-in bit from `self`

, and returns a tuple of the
difference along with a boolean indicating whether an arithmetic
overflow would occur. On overflow, the wrapped value is returned.

This allows chaining together multiple subtractions to create a
wider subtraction, and can be useful for bignum subtraction. This
method should only be used for the most significant word; for the
less significant words the unsigned method
`u128::borrowing_sub`

should be used.

The output boolean returned by this method is *not* a borrow flag,
and should *not* be subtracted from a more significant word.

If the input borrow is false, this method is equivalent to
`overflowing_sub`

.

##### §Examples

```
#![feature(bigint_helper_methods)]
// Only the most significant word is signed.
//
// 6 8 (a = 6 × 2^128 + 8)
// - -5 9 (b = -5 × 2^128 + 9)
// ---------
// 10 MAX (diff = 10 × 2^128 + 2^128 - 1)
let (a1, a0): (i128, u128) = (6, 8);
let (b1, b0): (i128, u128) = (-5, 9);
let borrow0 = false;
// u128::borrowing_sub for the less significant words
let (diff0, borrow1) = a0.borrowing_sub(b0, borrow0);
assert_eq!(borrow1, true);
// i128::borrowing_sub for the most significant word
let (diff1, overflow) = a1.borrowing_sub(b1, borrow1);
assert_eq!(overflow, false);
assert_eq!((diff1, diff0), (10, u128::MAX));
```

Run1.66.0 (const: 1.66.0) · source#### pub const fn overflowing_sub_unsigned(self, rhs: u128) -> (Self, bool)

#### pub const fn overflowing_sub_unsigned(self, rhs: u128) -> (Self, bool)

Calculates `self`

- `rhs`

with an unsigned `rhs`

Returns a tuple of the subtraction along with a boolean indicating whether an arithmetic overflow would occur. If an overflow would have occurred then the wrapped value is returned.

##### §Examples

Basic usage:

```
assert_eq!(1i128.overflowing_sub_unsigned(2), (-1, false));
assert_eq!((i128::MAX).overflowing_sub_unsigned(u128::MAX), (i128::MIN, false));
assert_eq!((i128::MIN + 2).overflowing_sub_unsigned(3), (i128::MAX, true));
```

Run1.7.0 (const: 1.32.0) · source#### pub const fn overflowing_mul(self, rhs: Self) -> (Self, bool)

#### pub const fn overflowing_mul(self, rhs: Self) -> (Self, bool)

Calculates the multiplication of `self`

and `rhs`

.

Returns a tuple of the multiplication along with a boolean indicating whether an arithmetic overflow would occur. If an overflow would have occurred then the wrapped value is returned.

##### §Examples

Basic usage:

```
assert_eq!(5i128.overflowing_mul(2), (10, false));
assert_eq!(1_000_000_000i32.overflowing_mul(10), (1410065408, true));
```

Run1.7.0 (const: 1.52.0) · source#### pub const fn overflowing_div(self, rhs: Self) -> (Self, bool)

#### pub const fn overflowing_div(self, rhs: Self) -> (Self, bool)

Calculates the divisor when `self`

is divided by `rhs`

.

Returns a tuple of the divisor along with a boolean indicating whether an arithmetic overflow would occur. If an overflow would occur then self is returned.

##### §Panics

This function will panic if `rhs`

is 0.

##### §Examples

Basic usage:

```
assert_eq!(5i128.overflowing_div(2), (2, false));
assert_eq!(i128::MIN.overflowing_div(-1), (i128::MIN, true));
```

Run1.38.0 (const: 1.52.0) · source#### pub const fn overflowing_div_euclid(self, rhs: Self) -> (Self, bool)

#### pub const fn overflowing_div_euclid(self, rhs: Self) -> (Self, bool)

Calculates the quotient of Euclidean division `self.div_euclid(rhs)`

.

Returns a tuple of the divisor along with a boolean indicating whether an arithmetic overflow would
occur. If an overflow would occur then `self`

is returned.

##### §Panics

This function will panic if `rhs`

is 0.

##### §Examples

Basic usage:

```
assert_eq!(5i128.overflowing_div_euclid(2), (2, false));
assert_eq!(i128::MIN.overflowing_div_euclid(-1), (i128::MIN, true));
```

Run1.7.0 (const: 1.52.0) · source#### pub const fn overflowing_rem(self, rhs: Self) -> (Self, bool)

#### pub const fn overflowing_rem(self, rhs: Self) -> (Self, bool)

Calculates the remainder when `self`

is divided by `rhs`

.

Returns a tuple of the remainder after dividing along with a boolean indicating whether an arithmetic overflow would occur. If an overflow would occur then 0 is returned.

##### §Panics

This function will panic if `rhs`

is 0.

##### §Examples

Basic usage:

```
assert_eq!(5i128.overflowing_rem(2), (1, false));
assert_eq!(i128::MIN.overflowing_rem(-1), (0, true));
```

Run1.38.0 (const: 1.52.0) · source#### pub const fn overflowing_rem_euclid(self, rhs: Self) -> (Self, bool)

#### pub const fn overflowing_rem_euclid(self, rhs: Self) -> (Self, bool)

Overflowing Euclidean remainder. Calculates `self.rem_euclid(rhs)`

.

Returns a tuple of the remainder after dividing along with a boolean indicating whether an arithmetic overflow would occur. If an overflow would occur then 0 is returned.

##### §Panics

This function will panic if `rhs`

is 0.

##### §Examples

Basic usage:

```
assert_eq!(5i128.overflowing_rem_euclid(2), (1, false));
assert_eq!(i128::MIN.overflowing_rem_euclid(-1), (0, true));
```

Run1.7.0 (const: 1.32.0) · source#### pub const fn overflowing_neg(self) -> (Self, bool)

#### pub const fn overflowing_neg(self) -> (Self, bool)

Negates self, overflowing if this is equal to the minimum value.

Returns a tuple of the negated version of self along with a boolean indicating whether an overflow
happened. If `self`

is the minimum value (e.g., `i32::MIN`

for values of type `i32`

), then the
minimum value will be returned again and `true`

will be returned for an overflow happening.

##### §Examples

Basic usage:

```
assert_eq!(2i128.overflowing_neg(), (-2, false));
assert_eq!(i128::MIN.overflowing_neg(), (i128::MIN, true));
```

Run1.7.0 (const: 1.32.0) · source#### pub const fn overflowing_shl(self, rhs: u32) -> (Self, bool)

#### pub const fn overflowing_shl(self, rhs: u32) -> (Self, bool)

Shifts self left by `rhs`

bits.

Returns a tuple of the shifted version of self along with a boolean indicating whether the shift value was larger than or equal to the number of bits. If the shift value is too large, then value is masked (N-1) where N is the number of bits, and this value is then used to perform the shift.

##### §Examples

Basic usage:

```
assert_eq!(0x1i128.overflowing_shl(4), (0x10, false));
assert_eq!(0x1i32.overflowing_shl(36), (0x10, true));
```

Run1.7.0 (const: 1.32.0) · source#### pub const fn overflowing_shr(self, rhs: u32) -> (Self, bool)

#### pub const fn overflowing_shr(self, rhs: u32) -> (Self, bool)

Shifts self right by `rhs`

bits.

Returns a tuple of the shifted version of self along with a boolean indicating whether the shift value was larger than or equal to the number of bits. If the shift value is too large, then value is masked (N-1) where N is the number of bits, and this value is then used to perform the shift.

##### §Examples

Basic usage:

```
assert_eq!(0x10i128.overflowing_shr(4), (0x1, false));
assert_eq!(0x10i32.overflowing_shr(36), (0x1, true));
```

Run1.13.0 (const: 1.32.0) · source#### pub const fn overflowing_abs(self) -> (Self, bool)

#### pub const fn overflowing_abs(self) -> (Self, bool)

Computes the absolute value of `self`

.

Returns a tuple of the absolute version of self along with a boolean indicating whether an overflow happened. If self is the minimum value (e.g., i128::MIN for values of type i128), then the minimum value will be returned again and true will be returned for an overflow happening.

##### §Examples

Basic usage:

```
assert_eq!(10i128.overflowing_abs(), (10, false));
assert_eq!((-10i128).overflowing_abs(), (10, false));
assert_eq!((i128::MIN).overflowing_abs(), (i128::MIN, true));
```

Run1.34.0 (const: 1.50.0) · source#### pub const fn overflowing_pow(self, exp: u32) -> (Self, bool)

#### pub const fn overflowing_pow(self, exp: u32) -> (Self, bool)

const: unstable · source#### pub fn isqrt(self) -> Self

🔬This is a nightly-only experimental API. (`isqrt`

#116226)

#### pub fn isqrt(self) -> Self

`isqrt`

#116226)1.38.0 (const: 1.52.0) · source#### pub const fn div_euclid(self, rhs: Self) -> Self

#### pub const fn div_euclid(self, rhs: Self) -> Self

Calculates the quotient of Euclidean division of `self`

by `rhs`

.

This computes the integer `q`

such that `self = q * rhs + r`

, with
`r = self.rem_euclid(rhs)`

and `0 <= r < abs(rhs)`

.

In other words, the result is `self / rhs`

rounded to the integer `q`

such that `self >= q * rhs`

.
If `self > 0`

, this is equal to round towards zero (the default in Rust);
if `self < 0`

, this is equal to round towards +/- infinity.

##### §Panics

This function will panic if `rhs`

is 0 or if `self`

is -1 and `rhs`

is
`Self::MIN`

. This behavior is not affected by the `overflow-checks`

flag.

##### §Examples

Basic usage:

```
let a: i128 = 7; // or any other integer type
let b = 4;
assert_eq!(a.div_euclid(b), 1); // 7 >= 4 * 1
assert_eq!(a.div_euclid(-b), -1); // 7 >= -4 * -1
assert_eq!((-a).div_euclid(b), -2); // -7 >= 4 * -2
assert_eq!((-a).div_euclid(-b), 2); // -7 >= -4 * 2
```

Run1.38.0 (const: 1.52.0) · source#### pub const fn rem_euclid(self, rhs: Self) -> Self

#### pub const fn rem_euclid(self, rhs: Self) -> Self

Calculates the least nonnegative remainder of `self (mod rhs)`

.

This is done as if by the Euclidean division algorithm – given
`r = self.rem_euclid(rhs)`

, `self = rhs * self.div_euclid(rhs) + r`

, and
`0 <= r < abs(rhs)`

.

##### §Panics

This function will panic if `rhs`

is 0 or if `self`

is -1 and `rhs`

is
`Self::MIN`

. This behavior is not affected by the `overflow-checks`

flag.

##### §Examples

Basic usage:

```
let a: i128 = 7; // or any other integer type
let b = 4;
assert_eq!(a.rem_euclid(b), 3);
assert_eq!((-a).rem_euclid(b), 1);
assert_eq!(a.rem_euclid(-b), 3);
assert_eq!((-a).rem_euclid(-b), 1);
```

Runsource#### pub const fn div_floor(self, rhs: Self) -> Self

🔬This is a nightly-only experimental API. (`int_roundings`

#88581)

#### pub const fn div_floor(self, rhs: Self) -> Self

`int_roundings`

#88581)Calculates the quotient of `self`

and `rhs`

, rounding the result towards negative infinity.

##### §Panics

This function will panic if `rhs`

is 0 or if `self`

is -1 and `rhs`

is
`Self::MIN`

. This behavior is not affected by the `overflow-checks`

flag.

##### §Examples

Basic usage:

```
#![feature(int_roundings)]
let a: i128 = 8;
let b = 3;
assert_eq!(a.div_floor(b), 2);
assert_eq!(a.div_floor(-b), -3);
assert_eq!((-a).div_floor(b), -3);
assert_eq!((-a).div_floor(-b), 2);
```

Runsource#### pub const fn div_ceil(self, rhs: Self) -> Self

🔬This is a nightly-only experimental API. (`int_roundings`

#88581)

#### pub const fn div_ceil(self, rhs: Self) -> Self

`int_roundings`

#88581)Calculates the quotient of `self`

and `rhs`

, rounding the result towards positive infinity.

##### §Panics

`rhs`

is 0 or if `self`

is -1 and `rhs`

is
`Self::MIN`

. This behavior is not affected by the `overflow-checks`

flag.

##### §Examples

Basic usage:

```
#![feature(int_roundings)]
let a: i128 = 8;
let b = 3;
assert_eq!(a.div_ceil(b), 3);
assert_eq!(a.div_ceil(-b), -2);
assert_eq!((-a).div_ceil(b), -2);
assert_eq!((-a).div_ceil(-b), 3);
```

Runsource#### pub const fn next_multiple_of(self, rhs: Self) -> Self

🔬This is a nightly-only experimental API. (`int_roundings`

#88581)

#### pub const fn next_multiple_of(self, rhs: Self) -> Self

`int_roundings`

#88581)If `rhs`

is positive, calculates the smallest value greater than or
equal to `self`

that is a multiple of `rhs`

. If `rhs`

is negative,
calculates the largest value less than or equal to `self`

that is a
multiple of `rhs`

.

##### §Panics

This function will panic if `rhs`

is zero.

###### §Overflow behavior

On overflow, this function will panic if overflow checks are enabled (default in debug mode) and wrap if overflow checks are disabled (default in release mode).

##### §Examples

Basic usage:

```
#![feature(int_roundings)]
assert_eq!(16_i128.next_multiple_of(8), 16);
assert_eq!(23_i128.next_multiple_of(8), 24);
assert_eq!(16_i128.next_multiple_of(-8), 16);
assert_eq!(23_i128.next_multiple_of(-8), 16);
assert_eq!((-16_i128).next_multiple_of(8), -16);
assert_eq!((-23_i128).next_multiple_of(8), -16);
assert_eq!((-16_i128).next_multiple_of(-8), -16);
assert_eq!((-23_i128).next_multiple_of(-8), -24);
```

Runsource#### pub const fn checked_next_multiple_of(self, rhs: Self) -> Option<Self>

🔬This is a nightly-only experimental API. (`int_roundings`

#88581)

#### pub const fn checked_next_multiple_of(self, rhs: Self) -> Option<Self>

`int_roundings`

#88581)If `rhs`

is positive, calculates the smallest value greater than or
equal to `self`

that is a multiple of `rhs`

. If `rhs`

is negative,
calculates the largest value less than or equal to `self`

that is a
multiple of `rhs`

. Returns `None`

if `rhs`

is zero or the operation
would result in overflow.

##### §Examples

Basic usage:

```
#![feature(int_roundings)]
assert_eq!(16_i128.checked_next_multiple_of(8), Some(16));
assert_eq!(23_i128.checked_next_multiple_of(8), Some(24));
assert_eq!(16_i128.checked_next_multiple_of(-8), Some(16));
assert_eq!(23_i128.checked_next_multiple_of(-8), Some(16));
assert_eq!((-16_i128).checked_next_multiple_of(8), Some(-16));
assert_eq!((-23_i128).checked_next_multiple_of(8), Some(-16));
assert_eq!((-16_i128).checked_next_multiple_of(-8), Some(-16));
assert_eq!((-23_i128).checked_next_multiple_of(-8), Some(-24));
assert_eq!(1_i128.checked_next_multiple_of(0), None);
assert_eq!(i128::MAX.checked_next_multiple_of(2), None);
```

Runconst: unstable · source#### pub fn midpoint(self, rhs: Self) -> Self

🔬This is a nightly-only experimental API. (`num_midpoint`

#110840)

#### pub fn midpoint(self, rhs: Self) -> Self

`num_midpoint`

#110840)Calculates the middle point of `self`

and `rhs`

.

`midpoint(a, b)`

is `(a + b) >> 1`

as if it were performed in a
sufficiently-large signed integral type. This implies that the result is
always rounded towards negative infinity and that no overflow will ever occur.

##### §Examples

```
#![feature(num_midpoint)]
assert_eq!(0i128.midpoint(4), 2);
assert_eq!(0i128.midpoint(-1), -1);
assert_eq!((-1i128).midpoint(0), -1);
```

Run1.67.0 (const: 1.67.0) · source#### pub const fn ilog(self, base: Self) -> u32

#### pub const fn ilog(self, base: Self) -> u32

Returns the logarithm of the number with respect to an arbitrary base, rounded down.

This method might not be optimized owing to implementation details;
`ilog2`

can produce results more efficiently for base 2, and `ilog10`

can produce results more efficiently for base 10.

##### §Panics

This function will panic if `self`

is less than or equal to zero,
or if `base`

is less than 2.

##### §Examples

`assert_eq!(5i128.ilog(5), 1);`

Run1.67.0 (const: 1.67.0) · source#### pub const fn checked_ilog(self, base: Self) -> Option<u32>

#### pub const fn checked_ilog(self, base: Self) -> Option<u32>

Returns the logarithm of the number with respect to an arbitrary base, rounded down.

Returns `None`

if the number is negative or zero, or if the base is not at least 2.

This method might not be optimized owing to implementation details;
`checked_ilog2`

can produce results more efficiently for base 2, and
`checked_ilog10`

can produce results more efficiently for base 10.

##### §Examples

`assert_eq!(5i128.checked_ilog(5), Some(1));`

Run1.67.0 (const: 1.67.0) · source#### pub const fn checked_ilog2(self) -> Option<u32>

#### pub const fn checked_ilog2(self) -> Option<u32>

1.67.0 (const: 1.67.0) · source#### pub const fn checked_ilog10(self) -> Option<u32>

#### pub const fn checked_ilog10(self) -> Option<u32>

1.0.0 (const: 1.32.0) · source#### pub const fn abs(self) -> Self

#### pub const fn abs(self) -> Self

Computes the absolute value of `self`

.

##### §Overflow behavior

The absolute value of
`i128::MIN`

cannot be represented as an
`i128`

,
and attempting to calculate it will cause an overflow. This means
that code in debug mode will trigger a panic on this case and
optimized code will return
`i128::MIN`

without a panic. If you do not want this behavior, consider
using `unsigned_abs`

instead.

##### §Examples

Basic usage:

```
assert_eq!(10i128.abs(), 10);
assert_eq!((-10i128).abs(), 10);
```

Run1.60.0 (const: 1.60.0) · source#### pub const fn abs_diff(self, other: Self) -> u128

#### pub const fn abs_diff(self, other: Self) -> u128

Computes the absolute difference between `self`

and `other`

.

This function always returns the correct answer without overflow or panics by returning an unsigned integer.

##### §Examples

Basic usage:

```
assert_eq!(100i128.abs_diff(80), 20u128);
assert_eq!(100i128.abs_diff(110), 10u128);
assert_eq!((-100i128).abs_diff(80), 180u128);
assert_eq!((-100i128).abs_diff(-120), 20u128);
assert_eq!(i128::MIN.abs_diff(i128::MAX), u128::MAX);
```

Run1.0.0 (const: 1.32.0) · source#### pub const fn is_positive(self) -> bool

#### pub const fn is_positive(self) -> bool

1.0.0 (const: 1.32.0) · source#### pub const fn is_negative(self) -> bool

#### pub const fn is_negative(self) -> bool

1.32.0 (const: 1.44.0) · source#### pub const fn to_be_bytes(self) -> [u8; 16]

#### pub const fn to_be_bytes(self) -> [u8; 16]

1.32.0 (const: 1.44.0) · source#### pub const fn to_le_bytes(self) -> [u8; 16]

#### pub const fn to_le_bytes(self) -> [u8; 16]

1.32.0 (const: 1.44.0) · source#### pub const fn to_ne_bytes(self) -> [u8; 16]

#### pub const fn to_ne_bytes(self) -> [u8; 16]

Return the memory representation of this integer as a byte array in native byte order.

As the target platform’s native endianness is used, portable code
should use `to_be_bytes`

or `to_le_bytes`

, as appropriate,
instead.

##### §Examples

```
let bytes = 0x12345678901234567890123456789012i128.to_ne_bytes();
assert_eq!(
bytes,
if cfg!(target_endian = "big") {
[0x12, 0x34, 0x56, 0x78, 0x90, 0x12, 0x34, 0x56, 0x78, 0x90, 0x12, 0x34, 0x56, 0x78, 0x90, 0x12]
} else {
[0x12, 0x90, 0x78, 0x56, 0x34, 0x12, 0x90, 0x78, 0x56, 0x34, 0x12, 0x90, 0x78, 0x56, 0x34, 0x12]
}
);
```

Run1.32.0 (const: 1.44.0) · source#### pub const fn from_be_bytes(bytes: [u8; 16]) -> Self

#### pub const fn from_be_bytes(bytes: [u8; 16]) -> Self

Create an integer value from its representation as a byte array in big endian.

##### §Examples

```
let value = i128::from_be_bytes([0x12, 0x34, 0x56, 0x78, 0x90, 0x12, 0x34, 0x56, 0x78, 0x90, 0x12, 0x34, 0x56, 0x78, 0x90, 0x12]);
assert_eq!(value, 0x12345678901234567890123456789012);
```

RunWhen starting from a slice rather than an array, fallible conversion APIs can be used:

```
fn read_be_i128(input: &mut &[u8]) -> i128 {
let (int_bytes, rest) = input.split_at(std::mem::size_of::<i128>());
*input = rest;
i128::from_be_bytes(int_bytes.try_into().unwrap())
}
```

Run1.32.0 (const: 1.44.0) · source#### pub const fn from_le_bytes(bytes: [u8; 16]) -> Self

#### pub const fn from_le_bytes(bytes: [u8; 16]) -> Self

Create an integer value from its representation as a byte array in little endian.

##### §Examples

```
let value = i128::from_le_bytes([0x12, 0x90, 0x78, 0x56, 0x34, 0x12, 0x90, 0x78, 0x56, 0x34, 0x12, 0x90, 0x78, 0x56, 0x34, 0x12]);
assert_eq!(value, 0x12345678901234567890123456789012);
```

RunWhen starting from a slice rather than an array, fallible conversion APIs can be used:

```
fn read_le_i128(input: &mut &[u8]) -> i128 {
let (int_bytes, rest) = input.split_at(std::mem::size_of::<i128>());
*input = rest;
i128::from_le_bytes(int_bytes.try_into().unwrap())
}
```

Run1.32.0 (const: 1.44.0) · source#### pub const fn from_ne_bytes(bytes: [u8; 16]) -> Self

#### pub const fn from_ne_bytes(bytes: [u8; 16]) -> Self

Create an integer value from its memory representation as a byte array in native endianness.

As the target platform’s native endianness is used, portable code
likely wants to use `from_be_bytes`

or `from_le_bytes`

, as
appropriate instead.

##### §Examples

```
let value = i128::from_ne_bytes(if cfg!(target_endian = "big") {
[0x12, 0x34, 0x56, 0x78, 0x90, 0x12, 0x34, 0x56, 0x78, 0x90, 0x12, 0x34, 0x56, 0x78, 0x90, 0x12]
} else {
[0x12, 0x90, 0x78, 0x56, 0x34, 0x12, 0x90, 0x78, 0x56, 0x34, 0x12, 0x90, 0x78, 0x56, 0x34, 0x12]
});
assert_eq!(value, 0x12345678901234567890123456789012);
```

RunWhen starting from a slice rather than an array, fallible conversion APIs can be used:

```
fn read_ne_i128(input: &mut &[u8]) -> i128 {
let (int_bytes, rest) = input.split_at(std::mem::size_of::<i128>());
*input = rest;
i128::from_ne_bytes(int_bytes.try_into().unwrap())
}
```

Runsource§### impl i128

### impl i128

1.0.0 (const: unstable) · source#### pub fn from_str_radix(src: &str, radix: u32) -> Result<i128, ParseIntError>

#### pub fn from_str_radix(src: &str, radix: u32) -> Result<i128, ParseIntError>

Converts a string slice in a given base to an integer.

The string is expected to be an optional `+`

sign
followed by digits.
Leading and trailing whitespace represent an error.
Digits are a subset of these characters, depending on `radix`

:

`0-9`

`a-z`

`A-Z`

##### §Panics

This function panics if `radix`

is not in the range from 2 to 36.

##### §Examples

Basic usage:

`assert_eq!(i128::from_str_radix("A", 16), Ok(10));`

Run## Trait Implementations§

1.22.0 · source§### impl AddAssign<&i128> for Saturating<i128>

### impl AddAssign<&i128> for Saturating<i128>

source§#### fn add_assign(&mut self, other: &i128)

#### fn add_assign(&mut self, other: &i128)

`+=`

operation. Read more1.22.0 · source§### impl AddAssign<&i128> for Wrapping<i128>

### impl AddAssign<&i128> for Wrapping<i128>

source§#### fn add_assign(&mut self, other: &i128)

#### fn add_assign(&mut self, other: &i128)

`+=`

operation. Read more1.22.0 · source§### impl AddAssign<&i128> for i128

### impl AddAssign<&i128> for i128

source§#### fn add_assign(&mut self, other: &i128)

#### fn add_assign(&mut self, other: &i128)

`+=`

operation. Read more1.74.0 · source§### impl AddAssign<i128> for Saturating<i128>

### impl AddAssign<i128> for Saturating<i128>

source§#### fn add_assign(&mut self, other: i128)

#### fn add_assign(&mut self, other: i128)

`+=`

operation. Read more1.60.0 · source§### impl AddAssign<i128> for Wrapping<i128>

### impl AddAssign<i128> for Wrapping<i128>

source§#### fn add_assign(&mut self, other: i128)

#### fn add_assign(&mut self, other: i128)

`+=`

operation. Read more1.8.0 · source§### impl AddAssign for i128

### impl AddAssign for i128

source§#### fn add_assign(&mut self, other: i128)

#### fn add_assign(&mut self, other: i128)

`+=`

operation. Read more1.22.0 · source§### impl BitAndAssign<&i128> for Saturating<i128>

### impl BitAndAssign<&i128> for Saturating<i128>

source§#### fn bitand_assign(&mut self, other: &i128)

#### fn bitand_assign(&mut self, other: &i128)

`&=`

operation. Read more1.22.0 · source§### impl BitAndAssign<&i128> for Wrapping<i128>

### impl BitAndAssign<&i128> for Wrapping<i128>

source§#### fn bitand_assign(&mut self, other: &i128)

#### fn bitand_assign(&mut self, other: &i128)

`&=`

operation. Read more1.22.0 · source§### impl BitAndAssign<&i128> for i128

### impl BitAndAssign<&i128> for i128

source§#### fn bitand_assign(&mut self, other: &i128)

#### fn bitand_assign(&mut self, other: &i128)

`&=`

operation. Read more1.74.0 · source§### impl BitAndAssign<i128> for Saturating<i128>

### impl BitAndAssign<i128> for Saturating<i128>

source§#### fn bitand_assign(&mut self, other: i128)

#### fn bitand_assign(&mut self, other: i128)

`&=`

operation. Read more1.60.0 · source§### impl BitAndAssign<i128> for Wrapping<i128>

### impl BitAndAssign<i128> for Wrapping<i128>

source§#### fn bitand_assign(&mut self, other: i128)

#### fn bitand_assign(&mut self, other: i128)

`&=`

operation. Read more1.8.0 · source§### impl BitAndAssign for i128

### impl BitAndAssign for i128

source§#### fn bitand_assign(&mut self, other: i128)

#### fn bitand_assign(&mut self, other: i128)

`&=`

operation. Read more1.22.0 · source§### impl BitOrAssign<&i128> for Saturating<i128>

### impl BitOrAssign<&i128> for Saturating<i128>

source§#### fn bitor_assign(&mut self, other: &i128)

#### fn bitor_assign(&mut self, other: &i128)

`|=`

operation. Read more1.22.0 · source§### impl BitOrAssign<&i128> for Wrapping<i128>

### impl BitOrAssign<&i128> for Wrapping<i128>

source§#### fn bitor_assign(&mut self, other: &i128)

#### fn bitor_assign(&mut self, other: &i128)

`|=`

operation. Read more1.22.0 · source§### impl BitOrAssign<&i128> for i128

### impl BitOrAssign<&i128> for i128

source§#### fn bitor_assign(&mut self, other: &i128)

#### fn bitor_assign(&mut self, other: &i128)

`|=`

operation. Read more1.74.0 · source§### impl BitOrAssign<i128> for Saturating<i128>

### impl BitOrAssign<i128> for Saturating<i128>

source§#### fn bitor_assign(&mut self, other: i128)

#### fn bitor_assign(&mut self, other: i128)

`|=`

operation. Read more1.60.0 · source§### impl BitOrAssign<i128> for Wrapping<i128>

### impl BitOrAssign<i128> for Wrapping<i128>

source§#### fn bitor_assign(&mut self, other: i128)

#### fn bitor_assign(&mut self, other: i128)

`|=`

operation. Read more1.8.0 · source§### impl BitOrAssign for i128

### impl BitOrAssign for i128

source§#### fn bitor_assign(&mut self, other: i128)

#### fn bitor_assign(&mut self, other: i128)

`|=`

operation. Read more1.22.0 · source§### impl BitXorAssign<&i128> for Saturating<i128>

### impl BitXorAssign<&i128> for Saturating<i128>

source§#### fn bitxor_assign(&mut self, other: &i128)

#### fn bitxor_assign(&mut self, other: &i128)

`^=`

operation. Read more1.22.0 · source§### impl BitXorAssign<&i128> for Wrapping<i128>

### impl BitXorAssign<&i128> for Wrapping<i128>

source§#### fn bitxor_assign(&mut self, other: &i128)

#### fn bitxor_assign(&mut self, other: &i128)

`^=`

operation. Read more1.22.0 · source§### impl BitXorAssign<&i128> for i128

### impl BitXorAssign<&i128> for i128

source§#### fn bitxor_assign(&mut self, other: &i128)

#### fn bitxor_assign(&mut self, other: &i128)

`^=`

operation. Read more1.74.0 · source§### impl BitXorAssign<i128> for Saturating<i128>

### impl BitXorAssign<i128> for Saturating<i128>

source§#### fn bitxor_assign(&mut self, other: i128)

#### fn bitxor_assign(&mut self, other: i128)

`^=`

operation. Read more1.60.0 · source§### impl BitXorAssign<i128> for Wrapping<i128>

### impl BitXorAssign<i128> for Wrapping<i128>

source§#### fn bitxor_assign(&mut self, other: i128)

#### fn bitxor_assign(&mut self, other: i128)

`^=`

operation. Read more1.8.0 · source§### impl BitXorAssign for i128

### impl BitXorAssign for i128

source§#### fn bitxor_assign(&mut self, other: i128)

#### fn bitxor_assign(&mut self, other: i128)

`^=`

operation. Read more1.0.0 · source§### impl Div for i128

### impl Div for i128

This operation rounds towards zero, truncating any fractional part of the exact result.

#### §Panics

This operation will panic if `other == 0`

or the division results in overflow.

1.22.0 · source§### impl DivAssign<&i128> for Saturating<i128>

### impl DivAssign<&i128> for Saturating<i128>

source§#### fn div_assign(&mut self, other: &i128)

#### fn div_assign(&mut self, other: &i128)

`/=`

operation. Read more1.22.0 · source§### impl DivAssign<&i128> for Wrapping<i128>

### impl DivAssign<&i128> for Wrapping<i128>

source§#### fn div_assign(&mut self, other: &i128)

#### fn div_assign(&mut self, other: &i128)

`/=`

operation. Read more1.22.0 · source§### impl DivAssign<&i128> for i128

### impl DivAssign<&i128> for i128

source§#### fn div_assign(&mut self, other: &i128)

#### fn div_assign(&mut self, other: &i128)

`/=`

operation. Read more1.74.0 · source§### impl DivAssign<i128> for Saturating<i128>

### impl DivAssign<i128> for Saturating<i128>

source§#### fn div_assign(&mut self, other: i128)

#### fn div_assign(&mut self, other: i128)

`/=`

operation. Read more1.60.0 · source§### impl DivAssign<i128> for Wrapping<i128>

### impl DivAssign<i128> for Wrapping<i128>

source§#### fn div_assign(&mut self, other: i128)

#### fn div_assign(&mut self, other: i128)

`/=`

operation. Read more1.8.0 · source§### impl DivAssign for i128

### impl DivAssign for i128

source§#### fn div_assign(&mut self, other: i128)

#### fn div_assign(&mut self, other: i128)

`/=`

operation. Read more1.0.0 · source§### impl FromStr for i128

### impl FromStr for i128

§#### type Err = ParseIntError

#### type Err = ParseIntError

1.22.0 · source§### impl MulAssign<&i128> for Saturating<i128>

### impl MulAssign<&i128> for Saturating<i128>

source§#### fn mul_assign(&mut self, other: &i128)

#### fn mul_assign(&mut self, other: &i128)

`*=`

operation. Read more1.22.0 · source§### impl MulAssign<&i128> for Wrapping<i128>

### impl MulAssign<&i128> for Wrapping<i128>

source§#### fn mul_assign(&mut self, other: &i128)

#### fn mul_assign(&mut self, other: &i128)

`*=`

operation. Read more1.22.0 · source§### impl MulAssign<&i128> for i128

### impl MulAssign<&i128> for i128

source§#### fn mul_assign(&mut self, other: &i128)

#### fn mul_assign(&mut self, other: &i128)

`*=`

operation. Read more1.74.0 · source§### impl MulAssign<i128> for Saturating<i128>

### impl MulAssign<i128> for Saturating<i128>

source§#### fn mul_assign(&mut self, other: i128)

#### fn mul_assign(&mut self, other: i128)

`*=`

operation. Read more1.60.0 · source§### impl MulAssign<i128> for Wrapping<i128>

### impl MulAssign<i128> for Wrapping<i128>

source§#### fn mul_assign(&mut self, other: i128)

#### fn mul_assign(&mut self, other: i128)

`*=`

operation. Read more1.8.0 · source§### impl MulAssign for i128

### impl MulAssign for i128

source§#### fn mul_assign(&mut self, other: i128)

#### fn mul_assign(&mut self, other: i128)

`*=`

operation. Read more1.0.0 · source§### impl Ord for i128

### impl Ord for i128

1.0.0 (const: unstable) · source§### impl PartialEq for i128

### impl PartialEq for i128

1.0.0 · source§### impl PartialOrd for i128

### impl PartialOrd for i128

source§#### fn le(&self, other: &i128) -> bool

#### fn le(&self, other: &i128) -> bool

`self`

and `other`

) and is used by the `<=`

operator. Read more1.0.0 · source§### impl Rem for i128

### impl Rem for i128

This operation satisfies `n % d == n - (n / d) * d`

. The
result has the same sign as the left operand.

#### §Panics

This operation will panic if `other == 0`

or if `self / other`

results in overflow.

1.22.0 · source§### impl RemAssign<&i128> for Saturating<i128>

### impl RemAssign<&i128> for Saturating<i128>

source§#### fn rem_assign(&mut self, other: &i128)

#### fn rem_assign(&mut self, other: &i128)

`%=`

operation. Read more1.22.0 · source§### impl RemAssign<&i128> for Wrapping<i128>

### impl RemAssign<&i128> for Wrapping<i128>

source§#### fn rem_assign(&mut self, other: &i128)

#### fn rem_assign(&mut self, other: &i128)

`%=`

operation. Read more1.22.0 · source§### impl RemAssign<&i128> for i128

### impl RemAssign<&i128> for i128

source§#### fn rem_assign(&mut self, other: &i128)

#### fn rem_assign(&mut self, other: &i128)

`%=`

operation. Read more1.74.0 · source§### impl RemAssign<i128> for Saturating<i128>

### impl RemAssign<i128> for Saturating<i128>

source§#### fn rem_assign(&mut self, other: i128)

#### fn rem_assign(&mut self, other: i128)

`%=`

operation. Read more1.60.0 · source§### impl RemAssign<i128> for Wrapping<i128>

### impl RemAssign<i128> for Wrapping<i128>

source§#### fn rem_assign(&mut self, other: i128)

#### fn rem_assign(&mut self, other: i128)

`%=`

operation. Read more1.8.0 · source§### impl RemAssign for i128

### impl RemAssign for i128

source§#### fn rem_assign(&mut self, other: i128)

#### fn rem_assign(&mut self, other: i128)

`%=`

operation. Read more1.22.0 · source§### impl ShlAssign<&i128> for i128

### impl ShlAssign<&i128> for i128

source§#### fn shl_assign(&mut self, other: &i128)

#### fn shl_assign(&mut self, other: &i128)

`<<=`

operation. Read more1.22.0 · source§### impl ShlAssign<&i128> for i16

### impl ShlAssign<&i128> for i16

source§#### fn shl_assign(&mut self, other: &i128)

#### fn shl_assign(&mut self, other: &i128)

`<<=`

operation. Read more1.22.0 · source§### impl ShlAssign<&i128> for i32

### impl ShlAssign<&i128> for i32

source§#### fn shl_assign(&mut self, other: &i128)

#### fn shl_assign(&mut self, other: &i128)

`<<=`

operation. Read more1.22.0 · source§### impl ShlAssign<&i128> for i64

### impl ShlAssign<&i128> for i64

source§#### fn shl_assign(&mut self, other: &i128)

#### fn shl_assign(&mut self, other: &i128)

`<<=`

operation. Read more1.22.0 · source§### impl ShlAssign<&i128> for i8

### impl ShlAssign<&i128> for i8

source§#### fn shl_assign(&mut self, other: &i128)

#### fn shl_assign(&mut self, other: &i128)

`<<=`

operation. Read more1.22.0 · source§### impl ShlAssign<&i128> for isize

### impl ShlAssign<&i128> for isize

source§#### fn shl_assign(&mut self, other: &i128)

#### fn shl_assign(&mut self, other: &i128)

`<<=`

operation. Read more1.22.0 · source§### impl ShlAssign<&i128> for u128

### impl ShlAssign<&i128> for u128

source§#### fn shl_assign(&mut self, other: &i128)

#### fn shl_assign(&mut self, other: &i128)

`<<=`

operation. Read more1.22.0 · source§### impl ShlAssign<&i128> for u16

### impl ShlAssign<&i128> for u16

source§#### fn shl_assign(&mut self, other: &i128)

#### fn shl_assign(&mut self, other: &i128)

`<<=`

operation. Read more1.22.0 · source§### impl ShlAssign<&i128> for u32

### impl ShlAssign<&i128> for u32

source§#### fn shl_assign(&mut self, other: &i128)

#### fn shl_assign(&mut self, other: &i128)

`<<=`

operation. Read more1.22.0 · source§### impl ShlAssign<&i128> for u64

### impl ShlAssign<&i128> for u64

source§#### fn shl_assign(&mut self, other: &i128)

#### fn shl_assign(&mut self, other: &i128)

`<<=`

operation. Read more1.22.0 · source§### impl ShlAssign<&i128> for u8

### impl ShlAssign<&i128> for u8

source§#### fn shl_assign(&mut self, other: &i128)

#### fn shl_assign(&mut self, other: &i128)

`<<=`

operation. Read more1.22.0 · source§### impl ShlAssign<&i128> for usize

### impl ShlAssign<&i128> for usize

source§#### fn shl_assign(&mut self, other: &i128)

#### fn shl_assign(&mut self, other: &i128)

`<<=`

operation. Read more1.22.0 · source§### impl ShlAssign<&i16> for i128

### impl ShlAssign<&i16> for i128

source§#### fn shl_assign(&mut self, other: &i16)

#### fn shl_assign(&mut self, other: &i16)

`<<=`

operation. Read more1.22.0 · source§### impl ShlAssign<&i32> for i128

### impl ShlAssign<&i32> for i128

source§#### fn shl_assign(&mut self, other: &i32)

#### fn shl_assign(&mut self, other: &i32)

`<<=`

operation. Read more1.22.0 · source§### impl ShlAssign<&i64> for i128

### impl ShlAssign<&i64> for i128

source§#### fn shl_assign(&mut self, other: &i64)

#### fn shl_assign(&mut self, other: &i64)

`<<=`

operation. Read more1.22.0 · source§### impl ShlAssign<&i8> for i128

### impl ShlAssign<&i8> for i128

source§#### fn shl_assign(&mut self, other: &i8)

#### fn shl_assign(&mut self, other: &i8)

`<<=`

operation. Read more1.22.0 · source§### impl ShlAssign<&isize> for i128

### impl ShlAssign<&isize> for i128

source§#### fn shl_assign(&mut self, other: &isize)

#### fn shl_assign(&mut self, other: &isize)

`<<=`

operation. Read more1.22.0 · source§### impl ShlAssign<&u128> for i128

### impl ShlAssign<&u128> for i128

source§#### fn shl_assign(&mut self, other: &u128)

#### fn shl_assign(&mut self, other: &u128)

`<<=`

operation. Read more1.22.0 · source§### impl ShlAssign<&u16> for i128

### impl ShlAssign<&u16> for i128

source§#### fn shl_assign(&mut self, other: &u16)

#### fn shl_assign(&mut self, other: &u16)

`<<=`

operation. Read more1.22.0 · source§### impl ShlAssign<&u32> for i128

### impl ShlAssign<&u32> for i128

source§#### fn shl_assign(&mut self, other: &u32)

#### fn shl_assign(&mut self, other: &u32)

`<<=`

operation. Read more1.22.0 · source§### impl ShlAssign<&u64> for i128

### impl ShlAssign<&u64> for i128

source§#### fn shl_assign(&mut self, other: &u64)

#### fn shl_assign(&mut self, other: &u64)

`<<=`

operation. Read more1.22.0 · source§### impl ShlAssign<&u8> for i128

### impl ShlAssign<&u8> for i128

source§#### fn shl_assign(&mut self, other: &u8)

#### fn shl_assign(&mut self, other: &u8)

`<<=`

operation. Read more1.22.0 · source§### impl ShlAssign<&usize> for i128

### impl ShlAssign<&usize> for i128

source§#### fn shl_assign(&mut self, other: &usize)

#### fn shl_assign(&mut self, other: &usize)

`<<=`

operation. Read more1.8.0 · source§### impl ShlAssign<i128> for i16

### impl ShlAssign<i128> for i16

source§#### fn shl_assign(&mut self, other: i128)

#### fn shl_assign(&mut self, other: i128)

`<<=`

operation. Read more1.8.0 · source§### impl ShlAssign<i128> for i32

### impl ShlAssign<i128> for i32

source§#### fn shl_assign(&mut self, other: i128)

#### fn shl_assign(&mut self, other: i128)

`<<=`

operation. Read more1.8.0 · source§### impl ShlAssign<i128> for i64

### impl ShlAssign<i128> for i64

source§#### fn shl_assign(&mut self, other: i128)

#### fn shl_assign(&mut self, other: i128)

`<<=`

operation. Read more1.8.0 · source§### impl ShlAssign<i128> for i8

### impl ShlAssign<i128> for i8

source§#### fn shl_assign(&mut self, other: i128)

#### fn shl_assign(&mut self, other: i128)

`<<=`

operation. Read more1.8.0 · source§### impl ShlAssign<i128> for isize

### impl ShlAssign<i128> for isize

source§#### fn shl_assign(&mut self, other: i128)

#### fn shl_assign(&mut self, other: i128)

`<<=`

operation. Read more1.8.0 · source§### impl ShlAssign<i128> for u128

### impl ShlAssign<i128> for u128

source§#### fn shl_assign(&mut self, other: i128)

#### fn shl_assign(&mut self, other: i128)

`<<=`

operation. Read more1.8.0 · source§### impl ShlAssign<i128> for u16

### impl ShlAssign<i128> for u16

source§#### fn shl_assign(&mut self, other: i128)

#### fn shl_assign(&mut self, other: i128)

`<<=`

operation. Read more1.8.0 · source§### impl ShlAssign<i128> for u32

### impl ShlAssign<i128> for u32

source§#### fn shl_assign(&mut self, other: i128)

#### fn shl_assign(&mut self, other: i128)

`<<=`

operation. Read more1.8.0 · source§### impl ShlAssign<i128> for u64

### impl ShlAssign<i128> for u64

source§#### fn shl_assign(&mut self, other: i128)

#### fn shl_assign(&mut self, other: i128)

`<<=`

operation. Read more1.8.0 · source§### impl ShlAssign<i128> for u8

### impl ShlAssign<i128> for u8

source§#### fn shl_assign(&mut self, other: i128)

#### fn shl_assign(&mut self, other: i128)

`<<=`

operation. Read more1.8.0 · source§### impl ShlAssign<i128> for usize

### impl ShlAssign<i128> for usize

source§#### fn shl_assign(&mut self, other: i128)

#### fn shl_assign(&mut self, other: i128)

`<<=`

operation. Read more1.8.0 · source§### impl ShlAssign<i16> for i128

### impl ShlAssign<i16> for i128

source§#### fn shl_assign(&mut self, other: i16)

#### fn shl_assign(&mut self, other: i16)

`<<=`

operation. Read more1.8.0 · source§### impl ShlAssign<i32> for i128

### impl ShlAssign<i32> for i128

source§#### fn shl_assign(&mut self, other: i32)

#### fn shl_assign(&mut self, other: i32)

`<<=`

operation. Read more1.8.0 · source§### impl ShlAssign<i64> for i128

### impl ShlAssign<i64> for i128

source§#### fn shl_assign(&mut self, other: i64)

#### fn shl_assign(&mut self, other: i64)

`<<=`

operation. Read more1.8.0 · source§### impl ShlAssign<i8> for i128

### impl ShlAssign<i8> for i128

source§#### fn shl_assign(&mut self, other: i8)

#### fn shl_assign(&mut self, other: i8)

`<<=`

operation. Read more1.8.0 · source§### impl ShlAssign<isize> for i128

### impl ShlAssign<isize> for i128

source§#### fn shl_assign(&mut self, other: isize)

#### fn shl_assign(&mut self, other: isize)

`<<=`

operation. Read more1.8.0 · source§### impl ShlAssign<u128> for i128

### impl ShlAssign<u128> for i128

source§#### fn shl_assign(&mut self, other: u128)

#### fn shl_assign(&mut self, other: u128)

`<<=`

operation. Read more1.8.0 · source§### impl ShlAssign<u16> for i128

### impl ShlAssign<u16> for i128

source§#### fn shl_assign(&mut self, other: u16)

#### fn shl_assign(&mut self, other: u16)

`<<=`

operation. Read more1.8.0 · source§### impl ShlAssign<u32> for i128

### impl ShlAssign<u32> for i128

source§#### fn shl_assign(&mut self, other: u32)

#### fn shl_assign(&mut self, other: u32)

`<<=`

operation. Read more1.8.0 · source§### impl ShlAssign<u64> for i128

### impl ShlAssign<u64> for i128

source§#### fn shl_assign(&mut self, other: u64)

#### fn shl_assign(&mut self, other: u64)

`<<=`

operation. Read more1.8.0 · source§### impl ShlAssign<u8> for i128

### impl ShlAssign<u8> for i128

source§#### fn shl_assign(&mut self, other: u8)

#### fn shl_assign(&mut self, other: u8)

`<<=`

operation. Read more1.8.0 · source§### impl ShlAssign<usize> for i128

### impl ShlAssign<usize> for i128

source§#### fn shl_assign(&mut self, other: usize)

#### fn shl_assign(&mut self, other: usize)

`<<=`

operation. Read more1.8.0 · source§### impl ShlAssign for i128

### impl ShlAssign for i128

source§#### fn shl_assign(&mut self, other: i128)

#### fn shl_assign(&mut self, other: i128)

`<<=`

operation. Read more1.22.0 · source§### impl ShrAssign<&i128> for i128

### impl ShrAssign<&i128> for i128

source§#### fn shr_assign(&mut self, other: &i128)

#### fn shr_assign(&mut self, other: &i128)

`>>=`

operation. Read more1.22.0 · source§### impl ShrAssign<&i128> for i16

### impl ShrAssign<&i128> for i16

source§#### fn shr_assign(&mut self, other: &i128)

#### fn shr_assign(&mut self, other: &i128)

`>>=`

operation. Read more1.22.0 · source§### impl ShrAssign<&i128> for i32

### impl ShrAssign<&i128> for i32

source§#### fn shr_assign(&mut self, other: &i128)

#### fn shr_assign(&mut self, other: &i128)

`>>=`

operation. Read more1.22.0 · source§### impl ShrAssign<&i128> for i64

### impl ShrAssign<&i128> for i64

source§#### fn shr_assign(&mut self, other: &i128)

#### fn shr_assign(&mut self, other: &i128)

`>>=`

operation. Read more1.22.0 · source§### impl ShrAssign<&i128> for i8

### impl ShrAssign<&i128> for i8

source§#### fn shr_assign(&mut self, other: &i128)

#### fn shr_assign(&mut self, other: &i128)

`>>=`

operation. Read more1.22.0 · source§### impl ShrAssign<&i128> for isize

### impl ShrAssign<&i128> for isize

source§#### fn shr_assign(&mut self, other: &i128)

#### fn shr_assign(&mut self, other: &i128)

`>>=`

operation. Read more1.22.0 · source§### impl ShrAssign<&i128> for u128

### impl ShrAssign<&i128> for u128

source§#### fn shr_assign(&mut self, other: &i128)

#### fn shr_assign(&mut self, other: &i128)

`>>=`

operation. Read more1.22.0 · source§### impl ShrAssign<&i128> for u16

### impl ShrAssign<&i128> for u16

source§#### fn shr_assign(&mut self, other: &i128)

#### fn shr_assign(&mut self, other: &i128)

`>>=`

operation. Read more1.22.0 · source§### impl ShrAssign<&i128> for u32

### impl ShrAssign<&i128> for u32

source§#### fn shr_assign(&mut self, other: &i128)

#### fn shr_assign(&mut self, other: &i128)

`>>=`

operation. Read more1.22.0 · source§### impl ShrAssign<&i128> for u64

### impl ShrAssign<&i128> for u64

source§#### fn shr_assign(&mut self, other: &i128)

#### fn shr_assign(&mut self, other: &i128)

`>>=`

operation. Read more1.22.0 · source§### impl ShrAssign<&i128> for u8

### impl ShrAssign<&i128> for u8

source§#### fn shr_assign(&mut self, other: &i128)

#### fn shr_assign(&mut self, other: &i128)

`>>=`

operation. Read more1.22.0 · source§### impl ShrAssign<&i128> for usize

### impl ShrAssign<&i128> for usize

source§#### fn shr_assign(&mut self, other: &i128)

#### fn shr_assign(&mut self, other: &i128)

`>>=`

operation. Read more1.22.0 · source§### impl ShrAssign<&i16> for i128

### impl ShrAssign<&i16> for i128

source§#### fn shr_assign(&mut self, other: &i16)

#### fn shr_assign(&mut self, other: &i16)

`>>=`

operation. Read more1.22.0 · source§### impl ShrAssign<&i32> for i128

### impl ShrAssign<&i32> for i128

source§#### fn shr_assign(&mut self, other: &i32)

#### fn shr_assign(&mut self, other: &i32)

`>>=`

operation. Read more1.22.0 · source§### impl ShrAssign<&i64> for i128

### impl ShrAssign<&i64> for i128

source§#### fn shr_assign(&mut self, other: &i64)

#### fn shr_assign(&mut self, other: &i64)

`>>=`

operation. Read more1.22.0 · source§### impl ShrAssign<&i8> for i128

### impl ShrAssign<&i8> for i128

source§#### fn shr_assign(&mut self, other: &i8)

#### fn shr_assign(&mut self, other: &i8)

`>>=`

operation. Read more1.22.0 · source§### impl ShrAssign<&isize> for i128

### impl ShrAssign<&isize> for i128

source§#### fn shr_assign(&mut self, other: &isize)

#### fn shr_assign(&mut self, other: &isize)

`>>=`

operation. Read more1.22.0 · source§### impl ShrAssign<&u128> for i128

### impl ShrAssign<&u128> for i128

source§#### fn shr_assign(&mut self, other: &u128)

#### fn shr_assign(&mut self, other: &u128)

`>>=`

operation. Read more1.22.0 · source§### impl ShrAssign<&u16> for i128

### impl ShrAssign<&u16> for i128

source§#### fn shr_assign(&mut self, other: &u16)

#### fn shr_assign(&mut self, other: &u16)

`>>=`

operation. Read more1.22.0 · source§### impl ShrAssign<&u32> for i128

### impl ShrAssign<&u32> for i128

source§#### fn shr_assign(&mut self, other: &u32)

#### fn shr_assign(&mut self, other: &u32)

`>>=`

operation. Read more1.22.0 · source§### impl ShrAssign<&u64> for i128

### impl ShrAssign<&u64> for i128

source§#### fn shr_assign(&mut self, other: &u64)

#### fn shr_assign(&mut self, other: &u64)

`>>=`

operation. Read more1.22.0 · source§### impl ShrAssign<&u8> for i128

### impl ShrAssign<&u8> for i128

source§#### fn shr_assign(&mut self, other: &u8)

#### fn shr_assign(&mut self, other: &u8)

`>>=`

operation. Read more1.22.0 · source§### impl ShrAssign<&usize> for i128

### impl ShrAssign<&usize> for i128

source§#### fn shr_assign(&mut self, other: &usize)

#### fn shr_assign(&mut self, other: &usize)

`>>=`

operation. Read more1.8.0 · source§### impl ShrAssign<i128> for i16

### impl ShrAssign<i128> for i16

source§#### fn shr_assign(&mut self, other: i128)

#### fn shr_assign(&mut self, other: i128)

`>>=`

operation. Read more1.8.0 · source§### impl ShrAssign<i128> for i32

### impl ShrAssign<i128> for i32

source§#### fn shr_assign(&mut self, other: i128)

#### fn shr_assign(&mut self, other: i128)

`>>=`

operation. Read more1.8.0 · source§### impl ShrAssign<i128> for i64

### impl ShrAssign<i128> for i64

source§#### fn shr_assign(&mut self, other: i128)

#### fn shr_assign(&mut self, other: i128)

`>>=`

operation. Read more1.8.0 · source§### impl ShrAssign<i128> for i8

### impl ShrAssign<i128> for i8

source§#### fn shr_assign(&mut self, other: i128)

#### fn shr_assign(&mut self, other: i128)

`>>=`

operation. Read more1.8.0 · source§### impl ShrAssign<i128> for isize

### impl ShrAssign<i128> for isize

source§#### fn shr_assign(&mut self, other: i128)

#### fn shr_assign(&mut self, other: i128)

`>>=`

operation. Read more1.8.0 · source§### impl ShrAssign<i128> for u128

### impl ShrAssign<i128> for u128

source§#### fn shr_assign(&mut self, other: i128)

#### fn shr_assign(&mut self, other: i128)

`>>=`

operation. Read more1.8.0 · source§### impl ShrAssign<i128> for u16

### impl ShrAssign<i128> for u16

source§#### fn shr_assign(&mut self, other: i128)

#### fn shr_assign(&mut self, other: i128)

`>>=`

operation. Read more1.8.0 · source§### impl ShrAssign<i128> for u32

### impl ShrAssign<i128> for u32

source§#### fn shr_assign(&mut self, other: i128)

#### fn shr_assign(&mut self, other: i128)

`>>=`

operation. Read more1.8.0 · source§### impl ShrAssign<i128> for u64

### impl ShrAssign<i128> for u64

source§#### fn shr_assign(&mut self, other: i128)

#### fn shr_assign(&mut self, other: i128)

`>>=`

operation. Read more1.8.0 · source§### impl ShrAssign<i128> for u8

### impl ShrAssign<i128> for u8

source§#### fn shr_assign(&mut self, other: i128)

#### fn shr_assign(&mut self, other: i128)

`>>=`

operation. Read more1.8.0 · source§### impl ShrAssign<i128> for usize

### impl ShrAssign<i128> for usize

source§#### fn shr_assign(&mut self, other: i128)

#### fn shr_assign(&mut self, other: i128)

`>>=`

operation. Read more1.8.0 · source§### impl ShrAssign<i16> for i128

### impl ShrAssign<i16> for i128

source§#### fn shr_assign(&mut self, other: i16)

#### fn shr_assign(&mut self, other: i16)

`>>=`

operation. Read more1.8.0 · source§### impl ShrAssign<i32> for i128

### impl ShrAssign<i32> for i128

source§#### fn shr_assign(&mut self, other: i32)

#### fn shr_assign(&mut self, other: i32)

`>>=`

operation. Read more1.8.0 · source§### impl ShrAssign<i64> for i128

### impl ShrAssign<i64> for i128

source§#### fn shr_assign(&mut self, other: i64)

#### fn shr_assign(&mut self, other: i64)

`>>=`

operation. Read more1.8.0 · source§### impl ShrAssign<i8> for i128

### impl ShrAssign<i8> for i128

source§#### fn shr_assign(&mut self, other: i8)

#### fn shr_assign(&mut self, other: i8)

`>>=`

operation. Read more1.8.0 · source§### impl ShrAssign<isize> for i128

### impl ShrAssign<isize> for i128

source§#### fn shr_assign(&mut self, other: isize)

#### fn shr_assign(&mut self, other: isize)

`>>=`

operation. Read more1.8.0 · source§### impl ShrAssign<u128> for i128

### impl ShrAssign<u128> for i128

source§#### fn shr_assign(&mut self, other: u128)

#### fn shr_assign(&mut self, other: u128)

`>>=`

operation. Read more1.8.0 · source§### impl ShrAssign<u16> for i128

### impl ShrAssign<u16> for i128

source§#### fn shr_assign(&mut self, other: u16)

#### fn shr_assign(&mut self, other: u16)

`>>=`

operation. Read more1.8.0 · source§### impl ShrAssign<u32> for i128

### impl ShrAssign<u32> for i128

source§#### fn shr_assign(&mut self, other: u32)

#### fn shr_assign(&mut self, other: u32)

`>>=`

operation. Read more1.8.0 · source§### impl ShrAssign<u64> for i128

### impl ShrAssign<u64> for i128

source§#### fn shr_assign(&mut self, other: u64)

#### fn shr_assign(&mut self, other: u64)

`>>=`

operation. Read more1.8.0 · source§### impl ShrAssign<u8> for i128

### impl ShrAssign<u8> for i128

source§#### fn shr_assign(&mut self, other: u8)

#### fn shr_assign(&mut self, other: u8)

`>>=`

operation. Read more1.8.0 · source§### impl ShrAssign<usize> for i128

### impl ShrAssign<usize> for i128

source§#### fn shr_assign(&mut self, other: usize)

#### fn shr_assign(&mut self, other: usize)

`>>=`

operation. Read more1.8.0 · source§### impl ShrAssign for i128

### impl ShrAssign for i128

source§#### fn shr_assign(&mut self, other: i128)

#### fn shr_assign(&mut self, other: i128)

`>>=`

operation. Read moresource§### impl Step for i128

### impl Step for i128

source§#### fn forward(start: Self, n: usize) -> Self

#### fn forward(start: Self, n: usize) -> Self

`step_trait`

#42168)source§#### fn backward(start: Self, n: usize) -> Self

#### fn backward(start: Self, n: usize) -> Self

`step_trait`

#42168)source§#### unsafe fn forward_unchecked(start: Self, n: usize) -> Self

#### unsafe fn forward_unchecked(start: Self, n: usize) -> Self

`step_trait`

#42168)source§#### unsafe fn backward_unchecked(start: Self, n: usize) -> Self

#### unsafe fn backward_unchecked(start: Self, n: usize) -> Self

`step_trait`

#42168)source§#### fn steps_between(start: &Self, end: &Self) -> Option<usize>

#### fn steps_between(start: &Self, end: &Self) -> Option<usize>

`step_trait`

#42168)1.22.0 · source§### impl SubAssign<&i128> for Saturating<i128>

### impl SubAssign<&i128> for Saturating<i128>

source§#### fn sub_assign(&mut self, other: &i128)

#### fn sub_assign(&mut self, other: &i128)

`-=`

operation. Read more1.22.0 · source§### impl SubAssign<&i128> for Wrapping<i128>

### impl SubAssign<&i128> for Wrapping<i128>

source§#### fn sub_assign(&mut self, other: &i128)

#### fn sub_assign(&mut self, other: &i128)

`-=`

operation. Read more1.22.0 · source§### impl SubAssign<&i128> for i128

### impl SubAssign<&i128> for i128

source§#### fn sub_assign(&mut self, other: &i128)

#### fn sub_assign(&mut self, other: &i128)

`-=`

operation. Read more1.74.0 · source§### impl SubAssign<i128> for Saturating<i128>

### impl SubAssign<i128> for Saturating<i128>

source§#### fn sub_assign(&mut self, other: i128)

#### fn sub_assign(&mut self, other: i128)

`-=`

operation. Read more1.60.0 · source§### impl SubAssign<i128> for Wrapping<i128>

### impl SubAssign<i128> for Wrapping<i128>

source§#### fn sub_assign(&mut self, other: i128)

#### fn sub_assign(&mut self, other: i128)

`-=`

operation. Read more1.8.0 · source§### impl SubAssign for i128

### impl SubAssign for i128

source§#### fn sub_assign(&mut self, other: i128)

#### fn sub_assign(&mut self, other: i128)

`-=`

operation. Read more