C++ Example - Calculate the Sum of Natural Numbers
Calculate the sum of 1+2+3+....+n.
Example
#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 the above program execution is:
输入一个正整数: 50 Sum = 1275other extensions