HW5.4

 import java.util.Scanner;

 public class Solution
 {
     public static void main(String[] args)
     {
         Scanner input = new Scanner(System.in);
         System.out.print("Enter a number: ");
         int number = input.nextInt();

         input.close();

         reverse(number);
     }

     public static void reverse(int number)
     {
         if(number < 10)
             System.out.print(number);
         else
         {
             System.out.print(number % 10);
             reverse(number / 10);
         }
     }
 }