[Tutor] (no subject)

[Tara Bryan]

Alexandre's answer is the best so far because it's the most readable to a 
true beginner programmer (like me).  My advice to Henry is to just keep 
going--you will start to know which function format to use based on instinct. 
 In other words, as you're exposed to it, you'll absorb the rules without 
having to learn them.  (But now that Alexandre has expressed them so well, it 
has made the rules more concrete in my mind, which can't be a bad thing!)