C++ BAEKJOON 8393번 합

[C++] BAEKJOON 8393번 : 합

 

#include <iostream>

using namespace std;

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

    cin >> n;
    for (int i = 1; i <= n; i++) {
        sum += i;
    }
    cout << sum << endl;
}