SQRT(3) BSD Programmer's Manual SQRT(3)

## NAME

**cbrt**, **cbrtf**, **sqrt**, **sqrtf** - cube root and square root functions

## LIBRARY

libm

## SYNOPSIS

**#include <math.h>**
*double*
**cbrt**(*double x*);
*float*
**cbrtf**(*float x*);
*double*
**sqrt**(*double x*);
*float*
**sqrtf**(*float x*);

## DESCRIPTION

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

## RETURN VALUES

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

## SEE ALSO

math(3)

## STANDARDS

The **sqrt**() function conforms to ANSI X3.159-1989 ("ANSI C").

## HISTORY

The **cbrt**() function appeared in 4.3BSD.
MirOS BSD #10-current May 6, 1991 1

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