Sum of Digits / Digital Root

Author: Parizval

README.md

@@ -17,6 +17,8 @@
 
  - [Counting Duplicates](https://github.com/Parizval/CodeWars/tree/master/CountingDuplicates)
 
+ - [Sum of Digits / Digital Root](https://github.com/Parizval/CodeWars/tree/master/DigitSum)
+ 
  - [Find X](https://github.com/Parizval/CodeWars/tree/master/Find%20X)
 
  - [The Hashtag Generator](https://github.com/Parizval/CodeWars/tree/master/HashTagGenerator)