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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