cbrt()

Syntax

Numeric cbrt()

Usage

For positive finite x, cbrt(-x) == -cbrt(x); that is, the cube root of a negative value is the negative of the cube root of that value's magnitude.

Special cases:

• If the value is NaN, then the result is NaN.
• If the value is infinite, then the result is an infinity with the same sign as the value.
• If the value is zero, then the result is a zero with the same sign as the value.

The computed result must be within 1 ulp of the exact result.