VontineDev

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using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Threading.Tasks;

namespace Syntax02

{

    class Program

    {

        static void Main(string[] args)

        {

            int num = -1;

            bool repeat = true;

            while (repeat)

            {

                Console.Write("구구단중에 원하는 단을 입력해주세요. ");

                string input = Console.ReadLine();

                try

                {

                    num = Convert.ToInt32(input);

                    if (num < Int32.MaxValue)

                    {

                        for (int i = 1; i < 10; i++)

                        {

                            Console.WriteLine($"{num} x {i} = {num * i}");

                        }

                    }

                    else

                    {

                        Console.WriteLine("num이 -2,147,483,648 and +2,147,483,647을 초과합니다.");

                    }

                }

                catch (FormatException)

                {

                    Console.WriteLine("입력된 문자열은 정수가 아닙니다.");

                }

                catch (OverflowException)

                {

                    Console.WriteLine("숫자가 Int32 규격에 맞지 않습니다.");

                }

                Console.Write("다시 하시겠습니까? (Y,N)");

                string go = Console.ReadLine();

                if (go.ToUpper() != "Y")

                {

                    repeat = false;

                }

            }

        }

    }

}

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