Manual Pages  — SQRT

cbrt, cbrtf, sqrt, sqrtf – cube root and square root functions

LIBRARY SYNOPSIS DESCRIPTION RETURN VALUES SEE ALSO STANDARDS HISTORY

Math Library (libm, -lm)

#include <math.h>

double
cbrt(double x)

float
cbrtf(float x)

double
sqrt(double x)

float
sqrtf(float x)

The cbrt() and the cbrtf() functions compute the cube root of x.

The sqrt() and the sqrtf() functions compute the non-negative square root of x.

The cbrt() and the cbrtf() functions return the requested cube root. The sqrt() and the sqrtf() functions return the requested square root unless an error occurs. An attempt to take the sqrt() of negative x raises an invalid exception and causes an (Na to be returned.

The sqrt() function conforms to ISO/IEC 9899:1990 ("ISO C90").

The cbrt() function appeared in BSD 4.3 .