using System;

    public class Program

{

public static void Main()

{

int i; // variable need to be initialized

i = 3;

Refsample(ref i);

    int j=21;

    Refsample(j);

Console.WriteLine(i);

    Console.WriteLine(j);

}

public static void Refsample(ref int val1)

{

val1 += 10;

}

        public static void Refsample( int val1)

{

val1 += 10;

}

}