using System;

public class Program

{

    public static void Main()

    {

        Console.WriteLine("This is For Loop");

        char ch;

        for (ch='A'; ch<='Z'; ch++)

        {

            Console.WriteLine(ch);

        }

        Console.WriteLine("This is While Loop");

        char chr='A';

        while(chr<='Z')

        {

            Console.WriteLine();

        chr++;

        }

        Console.WriteLine("This is Do While Loop");

        int nu=1;

        do

        {

            Console.WriteLine("10 9 8 7 6 5 4 3 2 1");

        nu++;

        }

        while(nu<=10);

    }

    }

​