Question

How to find sum of the first N even numbers in C++

Answer 1

#include <iostream>

int main() {
    int N = 5;

    int sum_even = N * (N + 1);

    std::cout << "The sum of the first " << N << " even numbers is: " << sum_even << std::endl;
}



// 2 + 4 + 6 + 8 + 10 = 30

/*
run:

The sum of the first 5 even numbers is: 30

*/

 

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