title: When to use functions and when to use messages
body: <p>I am really feeling like a nube today, i didn't realise Objective-C had functions - I simply thought that you always use to use messages!</p>
  
  <p>When should one use functions and when should one use messages?</p>
  
  <p>For example if I am creating a object within my class should I use a function?</p>