Java Program to Reverse a Number

In this tutorial, we are going to see how to write a Java program to reverse a number. For example, if the number entered by the user is 231, the output will be 132.
 

Java Program to Reverse a Number :

import java.util.Scanner;

public class Main
{
  public static void main(String args[])
  {
    int nbr, r = 0;

    System.out.print("Enter a number to reverse : ");
    Scanner sc = new Scanner(System.in);
    nbr = sc.nextInt();

    while(nbr != 0)
    {
      r = r * 10;
      r = r + nbr%10;
      nbr = nbr/10;
    }

    System.out.println("The reverse of the number is " + r);
  }
}

Output:

Enter a number to reverse : 231
The reverse of the number is 132

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