Java Programming Language

class ReverseNumber {
    public static void main(String[] args) {
        int input = 123;
        int temp, r, output = 0;
        temp = input;

        while (temp > 0) {
            r = temp % 10;
            temp = temp / 10;
            output = output * 10 + r;
        }

        System.out.println("Original Number : " + input);
        System.out.println("Reverse Number : " + output);
    }
}