Question

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

Answer 1

using System;

class Program
{
    static void Main()
    {
        int N = 5;
        int sum_even;

        // The sum of the first N even numbers is N * (N + 1)
        sum_even = N * (N + 1);

        Console.WriteLine("The sum of the first {0} even numbers is: {1}", N, sum_even);

    }
}



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

/*
run:

The sum of the first 5 even numbers is: 30

*/

 

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