class ReverseNumber {
    public static void main(String[] args) {
        if (args.length == 0) {
            System.out.println("❗ Please provide a number as a command line argument.");
            return;
        }
 
        try {
            int number = Integer.parseInt(args[0]);
            int reversed = 0;
 
            while (number != 0) {
                int digit = number % 10;
                reversed = reversed * 10 + digit;
                number /= 10;
            }
 
            System.out.println("🔄 Reversed Number: " + reversed);
        } catch (NumberFormatException e) {
            System.out.println("❌ Invalid input. Please enter a valid integer.");
        }
    }
}
 

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