correct formatting of Functions-in-Ruby.md

Functions-in-Ruby.md

@@ -1,20 +1,39 @@
-You can define a function using the reserve word `def` they are commonly methods than return a value
+#Functions in Ruby
+You define a function using the reserved word `def`on the first line of the function (the function declaration) and using the reserved word `end` on the last line, after all the action is done. 
+
+Ruby Methods always return a value, and always return only one single thing (an object). This object could be the object nil, but it is still an object. 
+
+An option for returning multiple objects is to return an Array that hold the things you need, but the Array itself is also a single object.  
+
+##Basic Examples:
 
-```ruby
-def my_function
-  return "something"
-end
+```
+	def my_function
+  		return "something"
+	end
 ```
 
 You can pass arguments that will be used within the method like this
 
-```ruby
-def sum(a, b)
-  return a + b
-end
+```
+	def sum(a, b)
+  		return a + b
+	end
 ```
 
 This method return the sum of a plus b arguments
 
+##Return is optional, but...
+Use of the return statement is optional in Ruby. However, if not used, the method will return the value that is returned by the last evaluated statement in that method.
+
+```
+	def no_return(number)
+ 		number + 2
+	end
+
+	p no_return(3) 
+```
 
+The function no_return() returns 5 because by default, Ruby methods return the value of the last expression evaluationed in the method. 
 
+If you want (or need) to return from a method "early" you can use return statement as usual, but be careful as doing so may result in some code not being executed.