using System;

​

public class Program

{

    public static void Main()

    {

        int number; 

        int remainder;

        Console.WriteLine ("please enter an integer value"); 

        number = Convert.ToInt32 (Console.ReadLine ()); // per convertire string in int

        remainder = number % 2; 

        //reminder = if the reminder is == 0 the number is even; else reminder =! 0 the number is odd

        // % modulus operator to have the reminder value (il resto della divisione in sostanza)

        if ( remainder == 0)

        {

            Console.WriteLine ( number + " is an even number");

        }

        else 

                {

            Console.WriteLine ( number + " is an odd number");

        }

        Console.WriteLine ("The even number until " + number + " are"); 

        int i = 0; 

         for (i = 0; i <= number; i++)

            {  

                if( i%2 == 0 )

                {

                    Console.Write(i + " ");

                }

            }

    }

}