Program to the sum of natural numbers

In this example, we will learn how to sum natural numbers using the c++ programming language.

To understand this example, You must have knowledge in following topics

• For Loop

To sum the natural number, We will use for loop. We will loop upto the number we want to calculate sum. Let’s look and example to make clear concepts.

#include <iostream>
using namespace std;

int main() {
    int n, sum = 0;

    cout << "Enter a positive integer: ";
    cin >> n;

    for (int i = 1; i <= n; ++i) {
        sum += i;
    }

    cout << "Sum = " << sum;
    return 0;
}

The output of above program is

Enter a positive integer: 10
Sum = 55