//variable for the choice that the user will make on fuel type
            int choice;
            do
            {
                //ask the user to select their required fuel
                Console.WriteLine("Please Pick The Number Of Your Fuel:");
                //choices that the user can make
                Console.WriteLine(" 1. Four Star Petrol");
                Console.WriteLine(" 2. Unleaded Petrol");
                Console.WriteLine(" 3. Diesel");
                choice = Convert.ToInt32(Console.ReadLine());
            }
            while ((choice < 3) && (choice > 0));