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Manual Reference Pages  - SQRT (3)

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sqrt, sqrtf, sqrtl - square root function

CONTENTS

Synopsis
Description
Errors

#include <math.h> 



double sqrt(double x); 



float sqrtf(float x); 



long double sqrtl(long double x); 

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

EDOM	x is negative.

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

hypot(3)

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