Easy csharp

Sum of first 7 natural numbers

Problem

Compute 1 + 2 + … + 7.

Hints

Ready — edit the code above and click Run.

using System;

class Program
{
    static void Main()
    {
        int n = 7;
        Console.WriteLine(n * (n + 1) / 2);
    }
}

Try solving on your own first, then reveal the official answer.

Gauss formula or loop.

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