using System;

public class Program

{

    public static void Main()

    {

        int i, j;

        i=1;

        j=1;

        Console.WriteLine("Before calling the function: ");

        Console.WriteLine("i= "+i+".j="+j);

        // statis method

        changeNumsDemo(i, ref j);

        Console.WriteLine("AFTER calling the function: ");

        Console.WriteLine("i= "+i+".j="+j);

        // meaning that the value passed by reference can be changed inside the functions called

        // while the value passed by copy can not.

    }

    //no return value so there is void

    static void changeNumsDemo(int a, ref int b)

    {

        a = 10*a; // pass by value

        b = 10*b; // pass by reference

    }

}