Luogu brush questions C++ language | P5722 Sum of arrays

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【Description】

Calculate the value of 1+2+3+⋯+( n −1)+ n  , where the positive integer  n  is not greater than 100. Since you are not as smart as Gauss, you are not allowed to use the arithmetic sequence summation formula to find the answer directly.

【enter】

Enter a positive integer  n .

【Output】

Output a positive integer representing the answer to the final summation.

【Input sample】

100

【Example of output】

5050

【Code Explanation】

#include <bits/stdc++.h>
using namespace std;

int main()
{
    int n, sum=0;
    cin >> n;
    for (int i=1; i<=n; i++) {
        sum += i;
    }
    cout << sum;
    return 0;
}

【operation result】

100
5050