f32 - Rust
Description: API documentation for the Rust `f32` primitive in crate `std`.
Keywords: rust, rustlang, rust-lang, f32

# Primitive Type f32 1.0.0 [−]

The 32-bit floating point type.

See also the `std::f32` module.

## Methods

### `impl f32`
[src]

#### `pub fn is_nan(self) -> bool`
[src]

Returns `true` if this value is `NaN` and false otherwise.

    use std::f32;

    let nan = f32::NAN;
    let f = 7.0_f32;

    assert!(nan.is_nan());
    assert!(!f.is_nan());Run

#### `pub fn is_infinite(self) -> bool`
[src]

Returns `true` if this value is positive infinity or negative infinity and false otherwise.

    use std::f32;

    let f = 7.0f32;
    let inf = f32::INFINITY;
    let neg_inf = f32::NEG_INFINITY;
    let nan = f32::NAN;

    assert!(!f.is_infinite());
    assert!(!nan.is_infinite());

    assert!(inf.is_infinite());
    assert!(neg_inf.is_infinite());Run

#### `pub fn is_finite(self) -> bool`
[src]

Returns `true` if this number is neither infinite nor `NaN`.

    use std::f32;

    let f = 7.0f32;
    let inf = f32::INFINITY;
    let neg_inf = f32::NEG_INFINITY;
    let nan = f32::NAN;

    assert!(f.is_finite());

    assert!(!nan.is_finite());
    assert!(!inf.is_finite());
    assert!(!neg_inf.is_finite());Run

#### `pub fn is_normal(self) -> bool`
[src]

Returns `true` if the number is neither zero, infinite, subnormal, or `NaN`.

    use std::f32;

    let min = f32::MIN_POSITIVE; // 1.17549435e-38f32
    let max = f32::MAX;
    let lower_than_min = 1.0e-40_f32;
    let zero = 0.0_f32;

    assert!(min.is_normal());
    assert!(max.is_normal());

    assert!(!zero.is_normal());
    assert!(!f32::NAN.is_normal());
    assert!(!f32::INFINITY.is_normal());
    // Values between `0` and `min` are Subnormal.
    assert!(!lower_than_min.is_normal());Run

#### `pub fn classify(self) -> FpCategory`
[src]

Returns the floating point category of the number. If only one property is going to be tested, it is generally faster to use the specific predicate instead.

    use std::num::FpCategory;
    use std::f32;

    let num = 12.4_f32;
    let inf = f32::INFINITY;

    assert_eq!(num.classify(), FpCategory::Normal);
    assert_eq!(inf.classify(), FpCategory::Infinite);Run

#### `pub fn floor(self) -> f32`
[src]

Returns the largest integer less than or equal to a number.

    let f = 3.99_f32;
    let g = 3.0_f32;

    assert_eq!(f.floor(), 3.0);
    assert_eq!(g.floor(), 3.0);Run

#### `pub fn ceil(self) -> f32`
[src]

Returns the smallest integer greater than or equal to a number.

    let f = 3.01_f32;
    let g = 4.0_f32;

    assert_eq!(f.ceil(), 4.0);
    assert_eq!(g.ceil(), 4.0);Run

#### `pub fn round(self) -> f32`
[src]

Returns the nearest integer to a number. Round half-way cases away from `0.0`.

    let f = 3.3_f32;
    let g = -3.3_f32;

    assert_eq!(f.round(), 3.0);
    assert_eq!(g.round(), -3.0);Run

#### `pub fn trunc(self) -> f32`
[src]

Returns the integer part of a number.

    let f = 3.3_f32;
    let g = -3.7_f32;

    assert_eq!(f.trunc(), 3.0);
    assert_eq!(g.trunc(), -3.0);Run

#### `pub fn fract(self) -> f32`
[src]

Returns the fractional part of a number.

    use std::f32;

    let x = 3.5_f32;
    let y = -3.5_f32;
    let abs_difference_x = (x.fract() - 0.5).abs();
    let abs_difference_y = (y.fract() - (-0.5)).abs();

    assert!(abs_difference_x <= f32::EPSILON);
    assert!(abs_difference_y <= f32::EPSILON);Run

#### `pub fn abs(self) -> f32`
[src]

Computes the absolute value of `self`. Returns `NAN` if the number is `NAN`.

    use std::f32;

    let x = 3.5_f32;
    let y = -3.5_f32;

    let abs_difference_x = (x.abs() - x).abs();
    let abs_difference_y = (y.abs() - (-y)).abs();

    assert!(abs_difference_x <= f32::EPSILON);
    assert!(abs_difference_y <= f32::EPSILON);

    assert!(f32::NAN.abs().is_nan());Run

#### `pub fn signum(self) -> f32`
[src]

Returns a number that represents the sign of `self`.

- `1.0` if the number is positive, `+0.0` or `INFINITY`
- `-1.0` if the number is negative, `-0.0` or `NEG_INFINITY`
- `NAN` if the number is `NAN`

    use std::f32;

    let f = 3.5_f32;

    assert_eq!(f.signum(), 1.0);
    assert_eq!(f32::NEG_INFINITY.signum(), -1.0);

    assert!(f32::NAN.signum().is_nan());Run

#### `pub fn is_sign_positive(self) -> bool`
[src]

Returns `true` if and only if `self` has a positive sign, including `+0.0`, `NaN`s with positive sign bit and positive infinity.

    let f = 7.0_f32;
    let g = -7.0_f32;

    assert!(f.is_sign_positive());
    assert!(!g.is_sign_positive());Run

#### `pub fn is_sign_negative(self) -> bool`
[src]

Returns `true` if and only if `self` has a negative sign, including `-0.0`, `NaN`s with negative sign bit and negative infinity.

    let f = 7.0f32;
    let g = -7.0f32;

    assert!(!f.is_sign_negative());
    assert!(g.is_sign_negative());Run

#### `pub fn mul_add(self, a: f32, b: f32) -> f32`
[src]

Fused multiply-add. Computes `(self * a) + b` with only one rounding error. This produces a more accurate result with better performance than a separate multiplication operation followed by an add.

    use std::f32;

    let m = 10.0_f32;
    let x = 4.0_f32;
    let b = 60.0_f32;

    // 100.0
    let abs_difference = (m.mul_add(x, b) - (m*x + b)).abs();

    assert!(abs_difference <= f32::EPSILON);Run

#### `pub fn recip(self) -> f32`
[src]

Takes the reciprocal (inverse) of a number, `1/x`.

    use std::f32;

    let x = 2.0_f32;
    let abs_difference = (x.recip() - (1.0/x)).abs();

    assert!(abs_difference <= f32::EPSILON);Run

#### `pub fn powi(self, n: i32) -> f32`
[src]

Raises a number to an integer power.

Using this function is generally faster than using `powf`

    use std::f32;

    let x = 2.0_f32;
    let abs_difference = (x.powi(2) - x*x).abs();

    assert!(abs_difference <= f32::EPSILON);Run

#### `pub fn powf(self, n: f32) -> f32`
[src]

Raises a number to a floating point power.

    use std::f32;

    let x = 2.0_f32;
    let abs_difference = (x.powf(2.0) - x*x).abs();

    assert!(abs_difference <= f32::EPSILON);Run

#### `pub fn sqrt(self) -> f32`
[src]

Takes the square root of a number.

Returns NaN if `self` is a negative number.

    use std::f32;

    let positive = 4.0_f32;
    let negative = -4.0_f32;

    let abs_difference = (positive.sqrt() - 2.0).abs();

    assert!(abs_difference <= f32::EPSILON);
    assert!(negative.sqrt().is_nan());Run

#### `pub fn exp(self) -> f32`
[src]

Returns `e^(self)`, (the exponential function).

    use std::f32;

    let one = 1.0f32;
    // e^1
    let e = one.exp();

    // ln(e) - 1 == 0
    let abs_difference = (e.ln() - 1.0).abs();

    assert!(abs_difference <= f32::EPSILON);Run

#### `pub fn exp2(self) -> f32`
[src]

Returns `2^(self)`.

    use std::f32;

    let f = 2.0f32;

    // 2^2 - 4 == 0
    let abs_difference = (f.exp2() - 4.0).abs();

    assert!(abs_difference <= f32::EPSILON);Run

#### `pub fn ln(self) -> f32`
[src]

Returns the natural logarithm of the number.

    use std::f32;

    let one = 1.0f32;
    // e^1
    let e = one.exp();

    // ln(e) - 1 == 0
    let abs_difference = (e.ln() - 1.0).abs();

    assert!(abs_difference <= f32::EPSILON);Run

#### `pub fn log(self, base: f32) -> f32`
[src]

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

    use std::f32;

    let ten = 10.0f32;
    let two = 2.0f32;

    // log10(10) - 1 == 0
    let abs_difference_10 = (ten.log(10.0) - 1.0).abs();

    // log2(2) - 1 == 0
    let abs_difference_2 = (two.log(2.0) - 1.0).abs();

    assert!(abs_difference_10 <= f32::EPSILON);
    assert!(abs_difference_2 <= f32::EPSILON);Run

#### `pub fn log2(self) -> f32`
[src]

Returns the base 2 logarithm of the number.

    use std::f32;

    let two = 2.0f32;

    // log2(2) - 1 == 0
    let abs_difference = (two.log2() - 1.0).abs();

    assert!(abs_difference <= f32::EPSILON);Run

#### `pub fn log10(self) -> f32`
[src]

Returns the base 10 logarithm of the number.

    use std::f32;

    let ten = 10.0f32;

    // log10(10) - 1 == 0
    let abs_difference = (ten.log10() - 1.0).abs();

    assert!(abs_difference <= f32::EPSILON);Run

#### `pub fn to_degrees(self) -> f32`
1.7.0
[src]

Converts radians to degrees.

    use std::f32::{self, consts};

    let angle = consts::PI;

    let abs_difference = (angle.to_degrees() - 180.0).abs();

    assert!(abs_difference <= f32::EPSILON);Run

#### `pub fn to_radians(self) -> f32`
1.7.0
[src]

Converts degrees to radians.

    use std::f32::{self, consts};

    let angle = 180.0f32;

    let abs_difference = (angle.to_radians() - consts::PI).abs();

    assert!(abs_difference <= f32::EPSILON);Run

#### `pub fn max(self, other: f32) -> f32`
[src]

Returns the maximum of the two numbers.

    let x = 1.0f32;
    let y = 2.0f32;

    assert_eq!(x.max(y), y);Run

If one of the arguments is NaN, then the other argument is returned.

#### `pub fn min(self, other: f32) -> f32`
[src]

Returns the minimum of the two numbers.

    let x = 1.0f32;
    let y = 2.0f32;

    assert_eq!(x.min(y), x);Run

If one of the arguments is NaN, then the other argument is returned.

#### `pub fn abs_sub(self, other: f32) -> f32`
[src]

Deprecated since 1.10.0

: you probably meant `(self - other).abs()`: this operation is `(self - other).max(0.0)` (also known as `fdimf` in C). If you truly need the positive difference, consider using that expression or the C function `fdimf`, depending on how you wish to handle NaN (please consider filing an issue describing your use-case too).

The positive difference of two numbers.

- If `self <= other`: `0:0`
- Else: `self - other`

    use std::f32;

    let x = 3.0f32;
    let y = -3.0f32;

    let abs_difference_x = (x.abs_sub(1.0) - 2.0).abs();
    let abs_difference_y = (y.abs_sub(1.0) - 0.0).abs();

    assert!(abs_difference_x <= f32::EPSILON);
    assert!(abs_difference_y <= f32::EPSILON);Run

#### `pub fn cbrt(self) -> f32`
[src]

Takes the cubic root of a number.

    use std::f32;

    let x = 8.0f32;

    // x^(1/3) - 2 == 0
    let abs_difference = (x.cbrt() - 2.0).abs();

    assert!(abs_difference <= f32::EPSILON);Run

#### `pub fn hypot(self, other: f32) -> f32`
[src]

Calculates the length of the hypotenuse of a right-angle triangle given legs of length `x` and `y`.

    use std::f32;

    let x = 2.0f32;
    let y = 3.0f32;

    // sqrt(x^2 + y^2)
    let abs_difference = (x.hypot(y) - (x.powi(2) + y.powi(2)).sqrt()).abs();

    assert!(abs_difference <= f32::EPSILON);Run

#### `pub fn sin(self) -> f32`
[src]

Computes the sine of a number (in radians).

    use std::f32;

    let x = f32::consts::PI/2.0;

    let abs_difference = (x.sin() - 1.0).abs();

    assert!(abs_difference <= f32::EPSILON);Run

#### `pub fn cos(self) -> f32`
[src]

Computes the cosine of a number (in radians).

    use std::f32;

    let x = 2.0*f32::consts::PI;

    let abs_difference = (x.cos() - 1.0).abs();

    assert!(abs_difference <= f32::EPSILON);Run

#### `pub fn tan(self) -> f32`
[src]

Computes the tangent of a number (in radians).

    use std::f32;

    let x = f32::consts::PI / 4.0;
    let abs_difference = (x.tan() - 1.0).abs();

    assert!(abs_difference <= f32::EPSILON);Run

#### `pub fn asin(self) -> f32`
[src]

Computes the arcsine of a number. Return value is in radians in the range [-pi/2, pi/2] or NaN if the number is outside the range [-1, 1].

    use std::f32;

    let f = f32::consts::PI / 2.0;

    // asin(sin(pi/2))
    let abs_difference = (f.sin().asin() - f32::consts::PI / 2.0).abs();

    assert!(abs_difference <= f32::EPSILON);Run

#### `pub fn acos(self) -> f32`
[src]

Computes the arccosine of a number. Return value is in radians in the range [0, pi] or NaN if the number is outside the range [-1, 1].

    use std::f32;

    let f = f32::consts::PI / 4.0;

    // acos(cos(pi/4))
    let abs_difference = (f.cos().acos() - f32::consts::PI / 4.0).abs();

    assert!(abs_difference <= f32::EPSILON);Run

#### `pub fn atan(self) -> f32`
[src]

Computes the arctangent of a number. Return value is in radians in the range [-pi/2, pi/2];

    use std::f32;

    let f = 1.0f32;

    // atan(tan(1))
    let abs_difference = (f.tan().atan() - 1.0).abs();

    assert!(abs_difference <= f32::EPSILON);Run

#### `pub fn atan2(self, other: f32) -> f32`
[src]

Computes the four quadrant arctangent of `self` (`y`) and `other` (`x`).

- `x = 0`, `y = 0`: `0`
- `x >= 0`: `arctan(y/x)` -> `[-pi/2, pi/2]`
- `y >= 0`: `arctan(y/x) + pi` -> `(pi/2, pi]`
- `y < 0`: `arctan(y/x) - pi` -> `(-pi, -pi/2)`

    use std::f32;

    let pi = f32::consts::PI;
    // All angles from horizontal right (+x)
    // 45 deg counter-clockwise
    let x1 = 3.0f32;
    let y1 = -3.0f32;

    // 135 deg clockwise
    let x2 = -3.0f32;
    let y2 = 3.0f32;

    let abs_difference_1 = (y1.atan2(x1) - (-pi/4.0)).abs();
    let abs_difference_2 = (y2.atan2(x2) - 3.0*pi/4.0).abs();

    assert!(abs_difference_1 <= f32::EPSILON);
    assert!(abs_difference_2 <= f32::EPSILON);Run

#### `pub fn sin_cos(self) -> (f32, f32)`
[src]

Simultaneously computes the sine and cosine of the number, `x`. Returns `(sin(x), cos(x))`.

    use std::f32;

    let x = f32::consts::PI/4.0;
    let f = x.sin_cos();

    let abs_difference_0 = (f.0 - x.sin()).abs();
    let abs_difference_1 = (f.1 - x.cos()).abs();

    assert!(abs_difference_0 <= f32::EPSILON);
    assert!(abs_difference_1 <= f32::EPSILON);Run

#### `pub fn exp_m1(self) -> f32`
[src]

Returns `e^(self) - 1` in a way that is accurate even if the number is close to zero.

    use std::f32;

    let x = 6.0f32;

    // e^(ln(6)) - 1
    let abs_difference = (x.ln().exp_m1() - 5.0).abs();

    assert!(abs_difference <= f32::EPSILON);Run

#### `pub fn ln_1p(self) -> f32`
[src]

Returns `ln(1+n)` (natural logarithm) more accurately than if the operations were performed separately.

    use std::f32;

    let x = f32::consts::E - 1.0;

    // ln(1 + (e - 1)) == ln(e) == 1
    let abs_difference = (x.ln_1p() - 1.0).abs();

    assert!(abs_difference <= f32::EPSILON);Run

#### `pub fn sinh(self) -> f32`
[src]

Hyperbolic sine function.

    use std::f32;

    let e = f32::consts::E;
    let x = 1.0f32;

    let f = x.sinh();
    // Solving sinh() at 1 gives `(e^2-1)/(2e)`
    let g = (e*e - 1.0)/(2.0*e);
    let abs_difference = (f - g).abs();

    assert!(abs_difference <= f32::EPSILON);Run

#### `pub fn cosh(self) -> f32`
[src]

Hyperbolic cosine function.

    use std::f32;

    let e = f32::consts::E;
    let x = 1.0f32;
    let f = x.cosh();
    // Solving cosh() at 1 gives this result
    let g = (e*e + 1.0)/(2.0*e);
    let abs_difference = (f - g).abs();

    // Same result
    assert!(abs_difference <= f32::EPSILON);Run

#### `pub fn tanh(self) -> f32`
[src]

Hyperbolic tangent function.

    use std::f32;

    let e = f32::consts::E;
    let x = 1.0f32;

    let f = x.tanh();
    // Solving tanh() at 1 gives `(1 - e^(-2))/(1 + e^(-2))`
    let g = (1.0 - e.powi(-2))/(1.0 + e.powi(-2));
    let abs_difference = (f - g).abs();

    assert!(abs_difference <= f32::EPSILON);Run

#### `pub fn asinh(self) -> f32`
[src]

Inverse hyperbolic sine function.

    use std::f32;

    let x = 1.0f32;
    let f = x.sinh().asinh();

    let abs_difference = (f - x).abs();

    assert!(abs_difference <= f32::EPSILON);Run

#### `pub fn acosh(self) -> f32`
[src]

Inverse hyperbolic cosine function.

    use std::f32;

    let x = 1.0f32;
    let f = x.cosh().acosh();

    let abs_difference = (f - x).abs();

    assert!(abs_difference <= f32::EPSILON);Run

#### `pub fn atanh(self) -> f32`
[src]

Inverse hyperbolic tangent function.

    use std::f32;

    let e = f32::consts::E;
    let f = e.tanh().atanh();

    let abs_difference = (f - e).abs();

    assert!(abs_difference <= 1e-5);Run

#### `pub fn to_bits(self) -> u32`
1.20.0
[src]

Raw transmutation to `u32`.

This is currently identical to `transmute::<f32, u32>(self)` on all platforms.

See `from_bits` for some discussion of the portability of this operation (there are almost no issues).

Note that this function is distinct from `as` casting, which attempts to preserve the numeric value, and not the bitwise value.

# Examples

    assert_ne!((1f32).to_bits(), 1f32 as u32); // to_bits() is not casting!
    assert_eq!((12.5f32).to_bits(), 0x41480000);
    Run

#### `pub fn from_bits(v: u32) -> Self`
1.20.0
[src]

Raw transmutation from `u32`.

This is currently identical to `transmute::<u32, f32>(v)` on all platforms. It turns out this is incredibly portable, for two reasons:

- Floats and Ints have the same endianess on all supported platforms.
- IEEE-754 very precisely specifies the bit layout of floats.

However there is one caveat: prior to the 2008 version of IEEE-754, how to interpret the NaN signaling bit wasn't actually specified. Most platforms (notably x86 and ARM) picked the interpretation that was ultimately standardized in 2008, but some didn't (notably MIPS). As a result, all signaling NaNs on MIPS are quiet NaNs on x86, and vice-versa.

Rather than trying to preserve signaling-ness cross-platform, this implementation favours preserving the exact bits. This means that any payloads encoded in NaNs will be preserved even if the result of this method is sent over the network from an x86 machine to a MIPS one.

If the results of this method are only manipulated by the same architecture that produced them, then there is no portability concern.

If the input isn't NaN, then there is no portability concern.

If you don't care about signalingness (very likely), then there is no portability concern.

Note that this function is distinct from `as` casting, which attempts to preserve the numeric value, and not the bitwise value.

# Examples

    use std::f32;
    let v = f32::from_bits(0x41480000);
    let difference = (v - 12.5).abs();
    assert!(difference <= 1e-5);Run

## Trait Implementations

### `impl PartialOrd<f32> for f32`
[src]

#### `fn partial_cmp(&self, other: &f32) -> Option<Ordering>`
[src]

This method returns an ordering between `self` and `other` values if one exists. Read more

#### `fn lt(&self, other: &f32) -> bool`
[src]

This method tests less than (for `self` and `other`) and is used by the `<` operator. Read more

#### `fn le(&self, other: &f32) -> bool`
[src]

This method tests less than or equal to (for `self` and `other`) and is used by the `<=` operator. Read more

#### `fn ge(&self, other: &f32) -> bool`
[src]

This method tests greater than or equal to (for `self` and `other`) and is used by the `>=` operator. Read more

#### `fn gt(&self, other: &f32) -> bool`
[src]

This method tests greater than (for `self` and `other`) and is used by the `>` operator. Read more

### `impl LowerExp for f32`
[src]

#### `fn fmt(&self, fmt: &mut Formatter) -> Result<(), Error>`
[src]

Formats the value using the given formatter.

### `impl Display for f32`
[src]

#### `fn fmt(&self, fmt: &mut Formatter) -> Result<(), Error>`
[src]

Formats the value using the given formatter. Read more

### `impl From<i8> for f32`
1.6.0
[src]

#### `fn from(small: i8) -> f32`
[src]

Performs the conversion.

### `impl From<i16> for f32`
1.6.0
[src]

#### `fn from(small: i16) -> f32`
[src]

Performs the conversion.

### `impl From<u8> for f32`
1.6.0
[src]

#### `fn from(small: u8) -> f32`
[src]

Performs the conversion.

### `impl From<u16> for f32`
1.6.0
[src]

#### `fn from(small: u16) -> f32`
[src]

Performs the conversion.

### `impl RemAssign<f32> for f32`
1.8.0
[src]

#### `fn rem_assign(&mut self, other: f32)`
[src]

Performs the `%=` operation.

### `impl<'a> RemAssign<&'a f32> for f32`
1.22.0
[src]

#### `fn rem_assign(&mut self, other: &'a f32)`
[src]

Performs the `%=` operation.

### `impl<'a> MulAssign<&'a f32> for f32`
1.22.0
[src]

#### `fn mul_assign(&mut self, other: &'a f32)`
[src]

Performs the `*=` operation.

### `impl MulAssign<f32> for f32`
1.8.0
[src]

#### `fn mul_assign(&mut self, other: f32)`
[src]

Performs the `*=` operation.

### `impl<'a> AddAssign<&'a f32> for f32`
1.22.0
[src]

#### `fn add_assign(&mut self, other: &'a f32)`
[src]

Performs the `+=` operation.

### `impl AddAssign<f32> for f32`
1.8.0
[src]

#### `fn add_assign(&mut self, other: f32)`
[src]

Performs the `+=` operation.

### `impl Neg for f32`
[src]

#### `type Output = f32`

The resulting type after applying the `-` operator.

#### `fn neg(self) -> f32`
[src]

Performs the unary `-` operation.

### `impl<'a> Neg for &'a f32`
[src]

#### `type Output = <f32 as Neg>::Output`

The resulting type after applying the `-` operator.

#### `fn neg(self) -> <f32 as Neg>::Output`
[src]

Performs the unary `-` operation.

### `impl Sub<f32> for f32`
[src]

#### `type Output = f32`

The resulting type after applying the `-` operator.

#### `fn sub(self, other: f32) -> f32`
[src]

Performs the `-` operation.

### `impl<'a> Sub<f32> for &'a f32`
[src]

#### `type Output = <f32 as Sub<f32>>::Output`

The resulting type after applying the `-` operator.

#### `fn sub(self, other: f32) -> <f32 as Sub<f32>>::Output`
[src]

Performs the `-` operation.

### `impl<'a> Sub<&'a f32> for f32`
[src]

#### `type Output = <f32 as Sub<f32>>::Output`

The resulting type after applying the `-` operator.

#### `fn sub(self, other: &'a f32) -> <f32 as Sub<f32>>::Output`
[src]

Performs the `-` operation.

### `impl<'a, 'b> Sub<&'a f32> for &'b f32`
[src]

#### `type Output = <f32 as Sub<f32>>::Output`

The resulting type after applying the `-` operator.

#### `fn sub(self, other: &'a f32) -> <f32 as Sub<f32>>::Output`
[src]

Performs the `-` operation.

### `impl<'a> Sum<&'a f32> for f32`
1.12.0
[src]

#### `fn sum<I>(iter: I) -> f32 where
I: Iterator<Item = &'a f32>,`
[src]

Method which takes an iterator and generates `Self` from the elements by "summing up" the items. Read more

### `impl Sum<f32> for f32`
1.12.0
[src]

#### `fn sum<I>(iter: I) -> f32 where
I: Iterator<Item = f32>,`
[src]

Method which takes an iterator and generates `Self` from the elements by "summing up" the items. Read more

### `impl Rem<f32> for f32`
[src]

#### `type Output = f32`

The resulting type after applying the `%` operator.

#### `fn rem(self, other: f32) -> f32`
[src]

Performs the `%` operation.

### `impl<'a> Rem<f32> for &'a f32`
[src]

#### `type Output = <f32 as Rem<f32>>::Output`

The resulting type after applying the `%` operator.

#### `fn rem(self, other: f32) -> <f32 as Rem<f32>>::Output`
[src]

Performs the `%` operation.

### `impl<'a> Rem<&'a f32> for f32`
[src]

#### `type Output = <f32 as Rem<f32>>::Output`

The resulting type after applying the `%` operator.

#### `fn rem(self, other: &'a f32) -> <f32 as Rem<f32>>::Output`
[src]

Performs the `%` operation.

### `impl<'a, 'b> Rem<&'a f32> for &'b f32`
[src]

#### `type Output = <f32 as Rem<f32>>::Output`

The resulting type after applying the `%` operator.

#### `fn rem(self, other: &'a f32) -> <f32 as Rem<f32>>::Output`
[src]

Performs the `%` operation.

### `impl UpperExp for f32`
[src]

#### `fn fmt(&self, fmt: &mut Formatter) -> Result<(), Error>`
[src]

Formats the value using the given formatter.

### `impl<'a> Div<f32> for &'a f32`
[src]

#### `type Output = <f32 as Div<f32>>::Output`

The resulting type after applying the `/` operator.

#### `fn div(self, other: f32) -> <f32 as Div<f32>>::Output`
[src]

Performs the `/` operation.

### `impl Div<f32> for f32`
[src]

#### `type Output = f32`

The resulting type after applying the `/` operator.

#### `fn div(self, other: f32) -> f32`
[src]

Performs the `/` operation.

### `impl<'a> Div<&'a f32> for f32`
[src]

#### `type Output = <f32 as Div<f32>>::Output`

The resulting type after applying the `/` operator.

#### `fn div(self, other: &'a f32) -> <f32 as Div<f32>>::Output`
[src]

Performs the `/` operation.

### `impl<'a, 'b> Div<&'a f32> for &'b f32`
[src]

#### `type Output = <f32 as Div<f32>>::Output`

The resulting type after applying the `/` operator.

#### `fn div(self, other: &'a f32) -> <f32 as Div<f32>>::Output`
[src]

Performs the `/` operation.

### `impl<'a> Product<&'a f32> for f32`
1.12.0
[src]

#### `fn product<I>(iter: I) -> f32 where
I: Iterator<Item = &'a f32>,`
[src]

Method which takes an iterator and generates `Self` from the elements by multiplying the items. Read more

### `impl Product<f32> for f32`
1.12.0
[src]

#### `fn product<I>(iter: I) -> f32 where
I: Iterator<Item = f32>,`
[src]

Method which takes an iterator and generates `Self` from the elements by multiplying the items. Read more

### `impl PartialEq<f32> for f32`
[src]

#### `fn eq(&self, other: &f32) -> bool`
[src]

This method tests for `self` and `other` values to be equal, and is used by `==`. Read more

#### `fn ne(&self, other: &f32) -> bool`
[src]

This method tests for `!=`.

### `impl<'a> Add<f32> for &'a f32`
[src]

#### `type Output = <f32 as Add<f32>>::Output`

The resulting type after applying the `+` operator.

#### `fn add(self, other: f32) -> <f32 as Add<f32>>::Output`
[src]

Performs the `+` operation.

### `impl<'a> Add<&'a f32> for f32`
[src]

#### `type Output = <f32 as Add<f32>>::Output`

The resulting type after applying the `+` operator.

#### `fn add(self, other: &'a f32) -> <f32 as Add<f32>>::Output`
[src]

Performs the `+` operation.

### `impl<'a, 'b> Add<&'a f32> for &'b f32`
[src]

#### `type Output = <f32 as Add<f32>>::Output`

The resulting type after applying the `+` operator.

#### `fn add(self, other: &'a f32) -> <f32 as Add<f32>>::Output`
[src]

Performs the `+` operation.

### `impl Add<f32> for f32`
[src]

#### `type Output = f32`

The resulting type after applying the `+` operator.

#### `fn add(self, other: f32) -> f32`
[src]

Performs the `+` operation.

### `impl DivAssign<f32> for f32`
1.8.0
[src]

#### `fn div_assign(&mut self, other: f32)`
[src]

Performs the `/=` operation.

### `impl<'a> DivAssign<&'a f32> for f32`
1.22.0
[src]

#### `fn div_assign(&mut self, other: &'a f32)`
[src]

Performs the `/=` operation.

### `impl SubAssign<f32> for f32`
1.8.0
[src]

#### `fn sub_assign(&mut self, other: f32)`
[src]

Performs the `-=` operation.

### `impl<'a> SubAssign<&'a f32> for f32`
1.22.0
[src]

#### `fn sub_assign(&mut self, other: &'a f32)`
[src]

Performs the `-=` operation.

### `impl FromStr for f32`
[src]

#### `type Err = ParseFloatError`

The associated error which can be returned from parsing.

#### `fn from_str(src: &str) -> Result<f32, ParseFloatError>`
[src]

Converts a string in base 10 to a float. Accepts an optional decimal exponent.

This function accepts strings such as

- '3.14'
- '-3.14'
- '2.5E10', or equivalently, '2.5e10'
- '2.5E-10'
- '5.'
- '.5', or, equivalently, '0.5'
- 'inf', '-inf', 'NaN'

Leading and trailing whitespace represent an error.

# Arguments

- src - A string

# Return value

`Err(ParseFloatError)` if the string did not represent a valid number. Otherwise, `Ok(n)` where `n` is the floating-point number represented by `src`.

### `impl Debug for f32`
[src]

#### `fn fmt(&self, fmt: &mut Formatter) -> Result<(), Error>`
[src]

Formats the value using the given formatter. Read more

### `impl Mul<f32> for f32`
[src]

#### `type Output = f32`

The resulting type after applying the `*` operator.

#### `fn mul(self, other: f32) -> f32`
[src]

Performs the `*` operation.

### `impl<'a> Mul<f32> for &'a f32`
[src]

#### `type Output = <f32 as Mul<f32>>::Output`

The resulting type after applying the `*` operator.

#### `fn mul(self, other: f32) -> <f32 as Mul<f32>>::Output`
[src]

Performs the `*` operation.

### `impl<'a> Mul<&'a f32> for f32`
[src]

#### `type Output = <f32 as Mul<f32>>::Output`

The resulting type after applying the `*` operator.

#### `fn mul(self, other: &'a f32) -> <f32 as Mul<f32>>::Output`
[src]

Performs the `*` operation.

### `impl<'a, 'b> Mul<&'a f32> for &'b f32`
[src]

#### `type Output = <f32 as Mul<f32>>::Output`

The resulting type after applying the `*` operator.

#### `fn mul(self, other: &'a f32) -> <f32 as Mul<f32>>::Output`
[src]

Performs the `*` operation.

### `impl Default for f32`
[src]

#### `fn default() -> f32`
[src]

Returns the default value of `0.0`

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