Java Program to Find Reverse of a Number

User enter any number and press enter then show the reverse of that number.

import java.util.*;
class ranjan1
{
 public static void main (String args[])
 {
  Scanner sc=new Scanner (System.in);
  long n,rev=0,r;
  System.out.print("Enter a number = ");
  n=sc.nextInt();
  while(n!=0)
  {
   r=n%10;
   rev=rev*10+r;
   n=n/10;
  }
  System.out.println("Reverse number = "+rev);
 }
}	

Output:

Enter a number = 347
Reverse number = 743