Update: Added Unary Operator in SumOfDigits algorithm (#1348)

* Update: Added Unary Operator in SumOfDigits algorithm

* Update: Added Unary Operator in SumOfDigits algorithm

Author: chetannada

Maths/SumOfDigits.js

@@ -8,12 +8,11 @@
 /*
   The given input is converted to a string, split into an array of characters.
   This array is reduced to a number using the method <Array>.reduce
-  NOTE: The final parseInt is just there in cases where 1 digit numbers are given, since without that it would result in a String output.
 */
 function sumOfDigitsUsingString (number) {
   if (number < 0) number = -number
 
-  return Number.parseInt(number.toString().split('').reduce((a, b) => Number(a) + Number(b)))
+  return +(number.toString().split('').reduce((a, b) => (+a) + (+b)))
 }
 
 /*