ln

fn ln(float x) -> float

Returns the natural logarithm of x.

ln(0.0) is negative infinity and a negative x gives NaN.

Parameters#

Returns#

float

Examples#

use tests::assert;
assert!(ln(1.0) == 0.0);
assert!(ln(0.0) < -1000000.0);

See also#

• sin: Returns the sine of x (in radians).
• cos: Returns the cosine of x (in radians).
• tan: Returns the tangent of x (in radians).
• sqrt: Returns the square root of x.
• floor: Returns the largest whole number less than or equal to x, as a float.
• ceil: Returns the smallest whole number greater than or equal to x, as a float.
• exp: Returns e raised to the power x.
• atan: Returns the arctangent of x, in radians in -pi/2..=pi/2.