using System;

​

public class Program

{

    public static void Main()

    {

        const double MIN_GARAGEWIDTH = 14;

        var isValid = false;

        while (!isValid)

        {

            Console.WriteLine("Garage Siding Calculator");

            Console.WriteLine();

            Console.WriteLine("Garage Dimensions");

            Console.Write(" Width: ");

            var inputString = Console.ReadLine();

            double garageWidth = 0;

            if (double.TryParse(inputString, out garageWidth))

            {

                if (garageWidth >= MIN_GARAGEWIDTH)

                {

                    isValid = true;

                } else 

                {

                    // Don't have to set isValid here, it's already false;

                    Console.WriteLine("Invalid answer ... Try again");

                }

            }

        }

    }

}