using System;

public class Program

{

    public static void Main()

    {

        /*an array with 5 rows and 2 columns*/ 

        int[,] a = new int[5,2] { {0, 0}, {1, 2}, {2, 4}, {3, 6}, {4, 8} };

        int i, j;

        /* output each array element's value*/

        for (i = 0; i < 5; i++)

        {

            for (j  = 0; j < 2; j++)

            {

                Console.WriteLine("a[{0},{1}] = {2}", i, j, a[i, j]);

            }

        }

        Console.WriteLine("Hello World");

    }

}