using System;

​

 public class Program

{

   public static void Main()

    {

        Console.Write("Enter a number: ");

        int number = Convert.ToInt32(Console.ReadLine());

​

        switch (number % 2)

        {

            case 0:

                Console.WriteLine("The number is even.");

                break;

            case 1:

                Console.WriteLine("The number is odd.");

                break;

            default:

                Console.WriteLine("Invalid input.");

                break;

        }

    }

 }