Question

Write a Java program to input three-digit integer number and reverse
it.

Answer 1

Explanation:

Reverse a number in Java

class ReverseNumber. { public static void main(String args[]) { int n, reverse = 0;

System. out. println("Enter an integer to reverse"); Scanner in = new Scanner(System. in); n = in. nextInt();

while(n != 0) { reverse = reverse * 10; reverse = reverse + n%10; n = n/10; }

Answer 2

       This program can also reverse numbers having more than 3 digits

import java.util.Scanner;

public class NumberReverser {

   int reverse = 0;

   public static void main(String [] args){

       Scanner sc = new Scanner(System.in);

       System.out.print("Enter a number: ");

       StringBuilder number = new StringBuilder(sc.next());

       System.out.print("The reversed number is ");

       System.out.print(number.reverse());

   }

}

Output:

Enter a number: 123456789

The reversed number is 987654321