SQRT

NAME

sqrt, sqrtf, sqrtl - square root function

#include <math.h>

double sqrt(double x);

float sqrtf(float x);

long double sqrtl(long double x);

The fBsqrt()fP function returns the non-negative square root of fIxfP. It fails and sets fIerrnofP to EDOM, if fIxfP is negative.

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