A C++ program to calculate and print sum of 1 to n numbers

        Using loop access each element one by one and add them to the sum variable. Once the loop is terminated print the sum.

Code

#include <iostream>

using namespace std;

int main()

{

    int n;

    cin>>n;

    

    int sum=0;

    

    for(int i=1;i<=n;i++){

        sum=sum+i;

    }

    

    cout<<sum;

    

    return 0;

}

Input

5

Output

15