using System;

public class Program

{

       static void Main(string[] args)

        {

​

            Console.WriteLine("Select a option which loop u want to run");

            Console.WriteLine("1.For Loop");

            Console.WriteLine("2.Do while loop");

            Console.WriteLine("3.While loop");

            Console.WriteLine("4.Do");

            Console.WriteLine("Enter your choice");

            int a;

            Program p = new Program();

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

​

            switch (a)

            {

                case 1:

                    Console.WriteLine("for loop running");

                    p.forloop();

                    break;

            }

        }

        void forloop()

        {

            Console.WriteLine("enter two numbers");

            int n1, n2;

            n1 = int.Parse(Console.ReadLine());

            n2 = int.Parse(Console.ReadLine());

        }

}