how to find reverse number from given number using C# language

how to find reverse number from given number using C# language

using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

namespace ConsoleApplication5

{

    class Program

    {

        static void Main(string[] args)

        {

            int n, rev=0,i;

            Console.WriteLine("enter num..");

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

            while (n > 0)

            {

                i = n % 10;

                rev = rev * 10 + i;

                n = n / 10;

            }

            Console.WriteLine("reverse num ={0}", rev);

            Console.ReadLine();

        }

    }

Input :  Enter the String  "123456789 "
OutPut : 987654321

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