C – sqrt() function

• sqrt( ) function in C is used to find the square root of the given number.
• ”math.h” header file supports sqrt( ) function in C language. Syntax for sqrt( ) function in C is given below.

double sqrt (double x);

Example program for sqrt() function in C:

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

int main()
{
   printf ("sqrt of 16 = %f\n", sqrt (16) );
   printf ("sqrt of  2 = %f\n", sqrt (2) );
   return 0;
}

Output:

sqrt of 16 = 4.000000 sqrt of 2 = 1.414214