Function Double reference parameter Learn programming C#

Lesson:

Exercise:

Function Double reference parameter

Objetive:

Create a function named "Double" to calculate the double of an integer number, and modify the data passed as an argument. It must be a "void" function and you must use "refererence parameters". For example.

x = 5;
Double(ref x);
Console.Write(x);

would display 10

Code:

using System;
public class exercise105
{
    public static void Double(ref int n)
    {
        n = n + n;
    }

    public static void Main()
    {
        int x = 2;

        Double(ref x);
        Console.WriteLine(x);
    }
}