LeetCode in Kotlin
3099. Harshad Number
Easy
An integer divisible by the sum of its digits is said to be a Harshad number. You are given an integer x. Return the sum of the digits of x if x is a Harshad number, otherwise, return -1.
Example 1:
Input: x = 18
Output: 9
Explanation:
The sum of digits of x is 9. 18 is divisible by 9. So 18 is a Harshad number and the answer is 9.
Example 2:
Input: x = 23
Output: -1
Explanation:
The sum of digits of x is 5. 23 is not divisible by 5. So 23 is not a Harshad number and the answer is -1.
Constraints:
1 <= x <= 100
Solution
class Solution {
fun sumOfTheDigitsOfHarshadNumber(x: Int): Int {
var sum = 0
var digit: Int
var temp = x
while (temp != 0) {
digit = temp % 10
sum += digit
temp /= 10
}
if (sum != 0 && x % sum == 0) {
return sum
}
return -1
}
}