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;
}