sqrt(3M)
NAME
sqrt − square root function
SYNOPSIS
cc [ flag ... ] file ... −lm [ library ... ]
#include <math.h>
double sqrt(double x);
DESCRIPTION
The sqrt() function computes the square root of x.
RETURN VALUES
Upon successful completion, sqrt() returns the square root of x.
If x is NaN, NaN is returned.
If x is negative, NaN is returned and errno is set to EDOM.
ERRORS
The sqrt() function will fail if:
EDOM The value of x is negative.
USAGE
An application wishing to check for error situations should set errno to 0 before calling sqrt(). If errno is non-zero on return, or the return value is NaN, an error has occurred.
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
| MT-Level | MT-Safe |
SEE ALSO
SunOS 5.6 — Last change: 29 Dec 1996