using System;

public class Program

{

    public static void Main()

    {

        //for

        for(int a=1; a<=3; a++)    //a++ คือเพิ่ค่าให้เท่ากับ3เพื่อให้เกิดเท็จ

        {

                Console.WriteLine("Hello World");

        }

        //while

        int b=1;

        while( b<=3 )

        {

            Console.WriteLine("Time out");

            b++;

        }

        //do while

        int c=1;

        do

        {

            Console.WriteLine("EIEI");

            c++;

        }while( c<=3 );

        //char

        char ans = 'y';

        do

        {

            Console.WriteLine("HOHOHO");

            Console.Write("[Y/N]");

            ans=char.Parse(Console.ReadLine());

        } while( ans == 'y' || ans=='Y');

        //แบบใส่จำนวนรอบเอง

        int i=1,count;

        Console.Write("Input count = ");

        count=int.Parse(Console.ReadLine());

        while(i<=count)

        {

            Console.WriteLine("Natthanan");

            i++;

        }while  (i<=2 );

        //แบบใส่จำนวนรอบเอง2

        int x=1,q;

        Console.Write("Input B =");

        b=int.Parse(Console.ReadLine());

        while(x<=q);

        {

            Console.WriteLine("Hello");

            x++;

        }

    }

}