P13 To reversing an integer

    class Program

    {

        static void Main(string[] args)

        {

            int n, r, ans = 0;

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

            n = int.Parse(Console.ReadLine());

            while (n > 0)

            {

                r = n % 10;

                ans = ans * 10 + r;

                n = n / 10;

            }

            Console.WriteLine("The reversed number is " + ans);

            Console.ReadLine();

        }

    }

Output :