Write a CPP program to calculate sum of first N natural numbers

// C++ program to calculate the sum of first N natural numbers

#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 of first " << n << " natural numbers is: " << sum;

    return 0;
}