C library function - sqrt()

Description

The C library function double sqrt(double x) returns the square root of x.

Declaration

Following is the declaration for sqrt() function.

double sqrt(double x)

Parameters

• x − This is the floating point value.

Return Value

This function returns the square root of x.

Example

The following example shows the usage of sqrt() function.

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

int main () {

   printf("Square root of %lf is %lf\n", 4.0, sqrt(4.0) );
   printf("Square root of %lf is %lf\n", 5.0, sqrt(5.0) );
   
   return(0);
}

Let us compile and run the above program that will produce the following result −

Square root of 4.000000 is 2.000000
Square root of 5.000000 is 2.236068