Function Double reference parameter Java Exercise - Java Programming Course

 Lesson

 Exercise

Function Double reference parameter

 Objetive

Write a java 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

 Example Code

public class Main
{
	public static void Double(int n)
	{
		n = n + n;
	}

	public static void main(String[] args)
	{
		int x = 2;

		Double(x);
		System.out.println(x);
	}
}