using System;

public class Program

{

    public static void Main()

    {

        var numbers = new[] { 3, 2, 19, 1, 90};

    //Sort()    

        Array.Sort(numbers);

        foreach (var n in numbers)

            Console.WriteLine(n);

    //Reverse()

        Array.Reverse(numbers);

        Console.WriteLine("Effect of Reverse");

        foreach (var n in numbers)

            Console.WriteLine(n);

    //Length

        Console.WriteLine("Length: " + numbers.Length);

    //IndexOf

        var index = Array.IndexOf(numbers, 19);

        Console.WriteLine("The index of 19: " + index);

    //Clear()

        Array.Clear(numbers, 2, 3);

        Console.WriteLine("Effect of Clear()");

        foreach (var n in numbers)

            Console.WriteLine(n);

    //Copy()

        int[] another = new int[3];

        Array.Copy(numbers, another, 3);

        Console.WriteLine("Effect of Copy()");

        foreach (var n in another)

        Console.WriteLine(n);

    }

}