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

SVID 3, POSIX, 4.3BSD, ISO 9899. The float and the long double variants are C99 requirements.

SEE ALSO

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