Module std::math

Math functions

Note that many standard math functions such as sin and sqrt are defined as methods on the f32 and f64 types.

Functions

fn abs<T>(a: T) -> T
T: Numeric

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Absolute value of a number
fn widening_abs<T>(a: T) -> unsigned_of<T>
T: Integer

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Absolute value of an integer (widened to the unsigned type)

Example
```
use std::math::widening_abs;

assert_eq!(widening_abs(-128i8), 128u8);
Run this example
```
fn div_floor<T>(a: T, b: T) -> (T, T)
T: Integer

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Calculates the quotient and remainder of integer division
Unlike the / operator which rounds towards zero, this function always rounds towards negative infinity. This is similar to how // and % work in Python.

Example
```
use std::math::div_floor;

let a = -3;
let b = 2;

assert_eq!((a / b, a % b), (-1, -1));
assert_eq!(a.div_floor(b), (-2, 1));
Run this example
```

Consts

const E: f64 = /* ... */

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Base of the natural logarithm
const FRAC_1_PI: f64 = /* ... */

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1/π
const FRAC_1_SQRT_2: f64 = /* ... */

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1/sqrt(2)
const FRAC_2_PI: f64 = /* ... */

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2/π
const FRAC_2_SQRT_PI: f64 = /* ... */

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2/sqrt(π)
const FRAC_PI_2: f64 = /* ... */

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π/2
const FRAC_PI_3: f64 = /* ... */

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π/3
const FRAC_PI_4: f64 = /* ... */

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π/4
const FRAC_PI_6: f64 = /* ... */

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π/6
const FRAC_PI_8: f64 = /* ... */

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π/8
const LN_10: f64 = /* ... */

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Natural logarithm of 10
const LN_2: f64 = /* ... */

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Natural logarithm of 2
const LOG10_2: f64 = /* ... */

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Logarithm base 10 of 2
const LOG10_E: f64 = /* ... */

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Logarithm base 10 of E
const LOG2_10: f64 = /* ... */

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Logarithm base 2 of 10
const LOG2_E: f64 = /* ... */

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Logarithm base 2 of E
const PI: f64 = /* ... */

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π
const SQRT_2: f64 = /* ... */

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Square root of 2
const TAU: f64 = /* ... */

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2π (also known as τ)