Hi guys I am not sure why my output is not printing the original number that the user inputs instead it prints 0.

 

For example, if the user enters the number 226689, the expected out put is supposed to show:

Enter a number to be reversed:The reverse of 226689 is 986622

 

However, my output shows:

Enter a number to be reversed:The reverse of 0 is 986622

 

Here's my code:

 

import java.util.Scanner;

public class ReverseDigits {

public static void main ( String args[] ) {

ReverseDigits reversal = new ReverseDigits();

reversal.reverseNumber ();

}

public void reverseNumber() {

Scanner input = new Scanner (System.in);

int num;

int digit;

int rev = 0;

System.out.printf("Enter a number to be reversed:");

num = input.nextInt ();

while(num != 0) {

digit = num % 10;

rev = rev * 10 + digit;

num /= 10;

}

System.out.printf("The reverse of %d is %d", num, rev);

}

}

You're dividing num by 10 every loop execution, until it's 0.

Then you're showing num, which is obviously 0.

Make spare variable int num2 = num; and show it instead.