Constructs a floating point number by multiplying x by 2 raised to the power of exp

Breaks the number into a normalized fraction and a base-2 exponent, satisfying:

• self = x * pow(2, exp)
• 0.5 <= abs(x) < 1.0

Returns the next representable floating-point value in the direction of other.

Simultaneously computes the sine and cosine of the number

Returns the exponential of the number, minus 1, in a way that is accurate even if the number is close to zero

Returns the natural logarithm of the number plus 1 (ln(1+n)) more accurately than if the operations were performed separately

Inverse hyperbolic sine

Returns

• on success, the inverse hyperbolic sine of self will be returned
• self if self is 0.0, -0.0, INFINITY, or NEG_INFINITY
• NAN if self is NAN

Inverse hyperbolic cosine

Returns

• on success, the inverse hyperbolic cosine of self will be returned
• INFINITY if self is INFINITY
• NAN if self is NAN or self < 1.0 (including NEG_INFINITY)

Inverse hyperbolic tangent

Returns

• on success, the inverse hyperbolic tangent of self will be returned
• self if self is 0.0 or -0.0
• INFINITY if self is 1.0
• NEG_INFINITY if self is -1.0
• NAN if the self is NAN or outside the domain of -1.0 <= self <= 1.0 (including INFINITY and NEG_INFINITY)

Converts a float to a string in a given radix

Arguments

• num - The float value
• radix - The base to use

Failure

Fails if called on a special value like inf, -inf or NAN due to possible misinterpretation of the result at higher bases. If those values are expected, use to_str_radix_special() instead.

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

This function accepts strings such as

• '3.14'
• '+3.14', equivalent to '3.14'
• '-3.14'
• '2.5E10', or equivalently, '2.5e10'
• '2.5E-10'
• '.' (understood as 0)
• '5.'
• '.5', or, equivalently, '0.5'
• '+inf', 'inf', '-inf', 'NaN'

Leading and trailing whitespace represent an error.

Arguments

• num - A string

Return value

none if the string did not represent a valid number. Otherwise, Some(n) where n is the floating-point number represented by num.

Convert a string in a given base to a float.

Due to possible conflicts, this function does not accept the special values inf, -inf, +inf and NaN, nor does it recognize exponents of any kind.

Leading and trailing whitespace represent an error.

Arguments

• num - A string
• radix - The base to use. Must lie in the range [2 .. 36]

Return value

None if the string did not represent a valid number. Otherwise, Some(n) where n is the floating-point number represented by num.

Generate a floating point number in the half-open interval [0,1).

See Closed01 for the closed interval [0,1], and Open01 for the open interval (0,1).

Returns true if the number is NaN

Returns true if the number is infinite

Returns true if the number is neither infinite or NaN

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

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.

Returns the mantissa, exponent and sign as integers.

Round half-way cases toward NEG_INFINITY

Round half-way cases toward INFINITY

Round half-way cases away from 0.0

The integer part of the number (rounds towards 0.0)

The fractional part of the number, satisfying:

let x = 1.65f64;
assert!(x == x.trunc() + x.fract())

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.

The reciprocal (multiplicative inverse) of the number

sqrt(2.0)

1.0 / sqrt(2.0)

Archimedes' constant

2.0 * pi

pi / 2.0

pi / 3.0

pi / 4.0

pi / 6.0

pi / 8.0

1.0 / pi

2.0 / pi

2.0 / sqrt(pi)

Euler's number

log2(e)

log10(e)

ln(2.0)

ln(10.0)

Returns the exponential of the number

Returns 2 raised to the power of the number

Returns the natural logarithm of the number

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

Returns the base 2 logarithm of the number

Returns the base 10 logarithm of the number

Converts to degrees, assuming the number is in radians

Converts to radians, assuming the number is in degrees

Computes the absolute value. Returns NAN if the number is NAN.

The positive difference of two numbers. Returns 0.0 if the number is less than or equal to other, otherwise the difference betweenself and other is returned.

Returns

• 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

Returns true if the number is positive, including +0.0 and INFINITY

Returns true if the number is negative, including -0.0 and NEG_INFINITY

Return a deep copy of the value.