sqrt(), sqrtf()

Calculate the nonnegative square root of a number

Synopsis:

#include <math.h>

double sqrt( double x );

float sqrtf( float x );

Library:

libm

Description:

These functions compute the nonnegative square root of x. A domain error occurs if the argument is negative.

Returns:

The value of the square root.

Examples:

#include <stdio.h>
#include <math.h>
#include <stdlib.h>

int main( void )
  {
    printf( "%f\n", sqrt(.5) );
    return EXIT_SUCCESS;
  }

produces the output:

0.707107

Classification:

ANSI

See also:

errno, exp(), log(), pow()