Update FizzBuzz.swift

Added Docstrings for easier understanding for beginners.

Author: CHIRAGGARORA

Fizz Buzz/FizzBuzz.swift

@@ -1,5 +1,17 @@
 // Last checked with Xcode Version 11.4.1 (11E503a)
 
+
+/**
+*  This function takes in an integer numberOfTurns as an input and prints out the numbers from 1 to numberOfTurns with the following modification:
+*  - If the number is divisible by 3, it prints "Fizz" instead of the number
+*  - If the number is divisible by 5, it prints "Buzz" instead of the number
+*  - If the number is divisible by both 3 and 5, it prints "Fizz Buzz" instead of the number
+*  - If the numberOfTurns is less than 1, it will print "Number of turns must be >= 1"
+*
+*  - parameter numberOfTurns: the number of turns for the fizzbuzz game
+*/
+
+
 func fizzBuzz(_ numberOfTurns: Int) {
     guard numberOfTurns >= 1 else {
         print("Number of turns must be >= 1")
@@ -18,4 +30,4 @@ func fizzBuzz(_ numberOfTurns: Int) {
             print("Fizz Buzz")
         }
     }
-}
+}