Untitled

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Multiplication_Table
{
    class Program
    {
        static void Main(string[] args)
        {
            int multiplyWith = Convert.ToInt32(args[0]);
            if (multiplyWith > 0 && multiplyWith <= 20)
            {
                Console.WriteLine("<!DOCTYPE html>");
                Console.WriteLine("<html>");
                Console.WriteLine("<head>");
                Console.WriteLine("     <title> Multiplication table </title>");
                Console.WriteLine("</head>");
                Console.WriteLine("<body>");
                Console.WriteLine("     Multiplication for number " + multiplyWith);
                Console.WriteLine("     <table>");
                for (int i = 1; i <= 10; i++)
                {
                    Console.WriteLine("         <tr>");
                    Console.WriteLine("             <td>" + i + "</td>");

                    Console.WriteLine("             <td>" + i * multiplyWith + "</td>");
                    Console.WriteLine("         </tr>");
                }
                Console.WriteLine("     </table>");
                Console.WriteLine("</body>");
                Console.WriteLine("</html>");

            }

        }
    }
}