Question

in java .. how can i order 4 digit number like(3427) to(7432) ...hint: we can( not )use an array :( never ever!

Answer 1

Program :

import java.util.Scanner;
public class Main
{
   public static void main(String[] args) {
   Scanner sc = new Scanner(System.in);
   int rem,rev=0;
   System.out.println("Enter a number:");
   int n = sc.nextInt(); //read the value from keyboard
   while(n!=0){
   rem = n% 10; //to find the remainder
rev = rev * 10 + rem; // multiply the rev with 10 and add remainder
n=n/ 10; //reduce digit by number (ex:3472 to 347)
   }
   System.out.println("Reverse of the digit :"+rev);
   }
}
Screenshot of the program :