using System;

using System.Linq;

​

public class Program

{

    public static void Main()

    {

        int[] array1 = new int[20000];

        int[] array2 = new int[20000];

        int[] square = new int[20000];

        int[] product = new int[20000];

        Random r = new Random();

        for (int i = 0; i < array1.Length; i++)

        {

            array1[i] = r.Next(1, 10);

            array2[i] = r.Next(1, 10);

            square[i] = array1[i] * array1[i];

            product[i] = array1[i] * array2[i];

        }

        // Only displaying the first 20 results

        Console.WriteLine("Array1 : {0}", String.Join(",", array1.Take(20)));

        Console.WriteLine("Array2 : {0}", String.Join(",", array2.Take(20)));

        Console.WriteLine("Square : {0}", String.Join(",", square.Take(20)));

        Console.WriteLine("Product: {0}", String.Join(",", product.Take(20)));

    }

}