C++ Program to check a number is a perfect number or not


In this program, You will learn how to check a number is a perfect number or not in C++.


Some list are: 6, 28, 496, 8128

if (n % i == 0) {

   s = s + i; 
}

Example: How to check a number is a perfect number or not in C++.

#include<iostream>
using namespace std;

int main() {

    int n, i = 1, s = 0;
    cout << "Enter a number:";
    cin>>n;

    while (i < n) {
        if (n % i == 0) {
            s = s + i;
        }
        i++;
    }

    if (s == n) {
        cout << "This is a perfect number:" << n;
    } else {
        cout << "This is not a perfect number :" << n;
    }

    return 0;
}

Output:

Enter a number:6
This is a perfect number:6

Xiith is created for educational, experimental, and schooling purpose. Examples on Xiith are made easier to make a better or basic understanding. Tutorials, testimonials, and examples are continuously checked to avoid delusion, but we cannot take complete responsibility of all programs on Xiith. When you are operating this site, you have to agree to read and accept our terms of use, cookie and privacy policy.Copyright © 2020 by Xiith. All Rights Reserved. About us.