Previous multiple of three | 7 kyu Kata Í javascript
Previous multiple of three | 7 kyu Kata Í javascript
🅺🅰🆃🅰: https://www.codewars.com/kata/61123a6...
🅳🅴🆂🅲🆁🅸🅿🆃🅸🅾🅽 :
Given a positive integer n: remove the last digit until you're left with a number that is a multiple of three.
Return n if the input is already a multiple of three, and if no such number exists, return null, a similar empty value, or -1.
Examples
1 = null
25 = null
36 = 36
1244 = 12
952406 = 9