ReverseNumber

class Main {
    
    public static void main(String[] args) {
        
        System.out.println("Hello World!");
        
        
        int num = 54321, reversed = 0;
    
        System.out.println("Original Number: " + num);

        // run loop until num becomes 0
        while(num != 0) {
    
            // get last digit from num
            int digit = num % 10;
            reversed = reversed * 10 + digit;

            // remove the last digit from num
            num /= 10;
        }

        System.out.println("Reversed Number: " + reversed);
        
        
    }
}