Package g0201_0300.s0258_add_digits

Class Solution

  • public class Solution
extends Object
    258 - Add Digits\. Easy Given an integer `num`, repeatedly add all its digits until the result has only one digit, and return it. **Example 1:** **Input:** num = 38 **Output:** 2 **Explanation:** The process is 38 --> 3 + 8 --> 11 11 --> 1 + 1 --> 2 Since 2 has only one digit, return it. **Example 2:** **Input:** num = 0 **Output:** 0 **Constraints:** * 0 <= num <= 231 - 1 **Follow up:** Could you do it without any loop/recursion in `O(1)` runtime?

    • Constructor Detail

      • Solution

        public Solution()

    • Method Detail

      • addDigits

        public int addDigits​(int num)