using System;

public class Program

{

    public static void Main()

    {

        int [] arrays = new int [20];

        for( int i = 0; i>20 ; ++i)

            {

                arrays[i] = i*5;

            }

        for( int i = 0; i>arrays.Length ; ++i)

            {

                Console.WriteLine(i+"  "+arrays[i]);

            }

    }

}

​