In this post, we will learn how to calculate the square of a number using C++ Programming language.
The square of a number is the product of the number with the number itself. For example: the square of 6 is 6 x 6 = 36.
We will calculate the square of a number using the following approaches:
- Using Standard Method
- Using Pow() Function
- Using Function
So, without further ado, let’s begin this post.
C++ Program to Calculate Square of a Number
// C++ Program to Calculate Square of a Number
#include <iostream>
using namespace std;
int main(){
int n, square;
// Asking for input
cout << "Enter a number: ";
cin >> n;
// Calculating square
square = n * n;
// Displaying output
cout << "Square of " << n << " is: " << square;
return 0;
}
Output
Enter a number: 25
Square of 25 is: 625
How Does This Program Work ?
int n, square;
In this program, we have declared two integer data type variables named n and square.
// Asking for input
cout << "Enter a number: ";
cin >> n;
The user is asked to enter a number. This number gets stored in the ‘n’ named variable.
// Calculating square
square = n * n;
Square is calculated by multiplying the same number by itself.
// Displaying output
cout << "Square of " << n << " is: " << square;
The square of the entered number is displayed on the screen using the cout statement.
C++ Program to Calculate Square of a Number Using Pow() Function
// C++ Program to Calculate Square of a Number Using Pow() Function
#include <iostream>
#include <cmath>
using namespace std;
int main(){
int n, square;
// Asking for input
cout << "Enter a number: ";
cin >> n;
// Calculating square
square = pow(n, 2);
// Displaying output
cout << "Square of " << n << " is: " << square;
return 0;
}
Output
Enter a number: 9
Square of 9 is: 81
C++ Program to Calculate Square of a Number Using Function
// C++ Program to Calculate Square of a Number Using Function
#include <iostream>
using namespace std;
int calSquare(int x){
return x * x;
}
int main(){
int n, square;
// Asking for input
cout << "Enter an integer: ";
cin >> n;
// Calling out the custom function
square = calSquare(n);
// Displaying output
cout << "The square of " << n << " is: " << square;
return 0;
}
Output
Enter an integer: 21
The square of 21 is: 441
Conclusion
I hope after going through this post, you understand how to calculate the square of a number using C++ Programming language.
If you have any doubt regarding the program, then contact us in the comment section. We will be delighted to solve your doubts.
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