totn C Functions

C Language: sqrt function
(Square Root)

In the C Programming Language, the sqrt function returns the square root of x.

Syntax

The syntax for the sqrt function in the C Language is:

double sqrt(double x);

Parameters or Arguments

x
A value used when calculating the square root of x.

Returns

The sqrt function returns the square root of x. If x is negative, the sqrt function will return a domain error.

Required Header

In the C Language, the required header for the sqrt function is:

#include <math.h>

Applies To

In the C Language, the sqrt function can be used in the following versions:

  • ANSI/ISO 9899-1990

sqrt Example

/* Example using sqrt by TechOnTheNet.com */

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

int main(int argc, const char * argv[])
{
    /* Define temporary variables */
    double value;
    double result;

    /* Assign the value we will find the sqrt of */
    value = 25;

    /* Calculate the square root of value */
    result = sqrt(value);

    /* Display the result of the calculation */
    printf("The Square Root of %f is %f\n", value, result);

    return 0;
}

When compiled and run, this application will output:

The Square Root of 25.000000 is 5.000000

Similar Functions

Other C functions that are similar to the sqrt function: