Calculates the square root of a number.

#include <math.h>

double sqrt (double x);

Parameters

x

Nonnegative value to calculate root for.

Return Values

The square-root result.

Success.

0 (zero) if x is negative, prints a DOMAIN error message to stderr and sets errno to EDOM.

Failure.

This function does not return standard ANSI domain or range errors.

Requirements

See Also

exp, log, matherr, pow