# C Program to calculate the square root of a given number

In this tutorial, we will learn a writing program in C to calculate the square root of a given number. There is a predefined function sqrt() in C which we will use to find the square root of any number. This program is going to be very easy like the square program in c and the cube program in c.

Before writing the program let’s know about square root.

## What is square root?

Square root can be defined as a factor of a number that, when multiplied by itself, gives the original number.

For example

2 is a square root of 4. -2 is also a square root of 4.

because 2*2 = 4 and -2 * -2 = 4,

## How Square root program in C will behave?

• Program will take one positive integer as an input for which we will calculate square root.
• After taking integer as an input, we will pass this value to sqrt() method. And this method will result square root of that number.
• This Sqrt() method is defined in math.h header file of C.
• Let’s see the program for better understanding.

## C Program to calculate Square Root of a number

``````#include<stdio.h>
#include<math.h>
int main() {
int num;
double result;
printf("C Program to find square root \n");
printf("Enter a Number to find square root: ");
scanf("%d", & num);
result = sqrt(num);
printf("Square Root of %d is %.2f", num, result);
}``````

Output

``````C Program to find square root
Enter a Number to find square root: 25
Square Root of 25 is 5.00``````