using System;

public class Program

{

    public static void Main()

    {

        string choice = "y";

        while(choice != "q" && choice != "Q")

        {

        Console.WriteLine("How many numbers in the Fibonacci sequence would you like to know?");

        error:

        string number = Console.ReadLine();

        double x;

        if (double.TryParse(number, out x))

        {

        int f1 = 1, f2 = 1;

        Console.Write("The first " + x + " Fibonacci numbers are: 1, 1");

        int i = 1;

            while (i <= x-2)

            {

            int fn = f1 + f2;

            Console.Write(", "+ fn);

            f1 = f2;

            f2 = fn;

            i++;

            }

            Console.WriteLine();

        Console.WriteLine("Please enter q to quit or any other key to continue.");

        choice = Console.ReadLine();

        }

        else 

        {

            Console.WriteLine("Please enter a positive number.");

            goto error;

    }

}

    }

}