NAME

sqrt, sqrtf, sqrtl - square root function

SYNOPSIS

#include <math.h>

double sqrt(double x);

float sqrtf(float x);

long double sqrtl(long double x);

Link with -lm.

DESCRIPTION

The sqrt() function returns the non-negative square root of x. It fails and sets errno to EDOM, if x is negative.

ERRORS

EDOM

x is negative.

CONFORMING TO

SVr4, 4.3BSD, C89. The float and long double variants are C99 requirements.

SEE ALSO

cbrt(3), csqrt(3), hypot(3)

COLOPHON

This page is part of release 2.78 of the Linux man-pages project. A description of the project, and information about reporting bugs, can be found at http://www.kernel.org/doc/man-pages/.