NAME

cbrt, cbrtf, cbrtl, sqrt, sqrtf, sqrtl — cube root and square root functions

SYNOPSIS

Math Library (libm, -lm)
#include <math.h>

double
cbrt(double x);

float
cbrtf(float x);

long double
cbrtl(long double x);

double
sqrt(double x);

float
sqrtf(float x);

long double
sqrtl(long double x);

DESCRIPTION

The cbrt() function computes the cube root of x. The cbrtf() function is a single precision version of cbrt(). The cbrtl() function is an extended precision version of cbrt().

The sqrt() function computes the non-negative square root of x. The sqrtf() function is a single precision version of sqrt(). The sqrtl() function is an extended precision version of sqrt().

RETURN VALUES

If x is negative, sqrt(x), sqrtf(x) and sqrtl(x) set the global variable errno to EDOM.

HISTORY

A sqrt() function first appeared in Version 2 AT&T UNIX.

The cbrt() function appeared in 4.3BSD.