using System;

public class Program

{

    public static void Main()

    {

        Start:

       Console.WriteLine("How old are you?");

       int age = Convert.ToInt32(Console.ReadLine());

        if (age <18) {

            Console.WriteLine ("That's too bad you will have to wait a couple of years."); }

        else if (age == 18) {

            Console.WriteLine ("Uff, barely made it!"); }

        else {

            Console.WriteLine ("You are allowed to enter!"); 

            Console.WriteLine(); }

        { goto Start; }

    }

}

​

​

​