LeetCode - Plus One

package manipulation;

public class PlusOne {

    public int[] plusOne(int[] digits) {
        int n = digits.length;
        int i = n - 1;
        for (; i >= 0; --i) {
            if (digits[i] != 9) {
                ++digits[i];
                return digits;
            } else {
                digits[i] = 0;
            }
        }
        
        digits = new int[n + 1];
        digits[0] = 1;
        return digits;
    }
    
    public static void main(String[] args) {
        // TODO Auto-generated method stub
        int[] digits = { 8,9,9 };
        PlusOne p = new PlusOne();
        for (int i : p.plusOne(digits))
            System.out.println(i);
    }

}