Add Digits LeetCode Solution

Here, We see Add Digits problem Solution. This Leetcode problem is done in many programming languages like C++, Java, JavaScript, Python, etc., with different approaches.

Add Digits LeetCode Solution

Problem Statement ->

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

• C++ Solution
• Java Solution
• JavaScript Solution
• Python Solution

Add Digits Leetcode Solution C++ ->

class Solution {
public:
    int addDigits(int num) {
        while(num>9){
            int temp = num%10;
            num = num/10 + temp;
        }
        return num;
    }
};
Code language: C++ (cpp)

Add Digits Leetcode Solution Java ->

class Solution {
    public int addDigits(int num) {
        if(num == 0) return 0;
        else if(num % 9 == 0) return 9;
        else return num % 9;
    }
}
Code language: Java (java)

Add Digits Leetcode Solution JavaScript ->

var addDigits = function(num) {
    return 1 + (num - 1) % 9;
};
Code language: JavaScript (javascript)

Add Digits Leetcode Python ->

class Solution(object):
    def addDigits(self, num):
        return num if num == 0 else num % 9 or 9
Code language: Python (python)