title: What are the default attributes for Objective-C properties?
body: <p>What are the default attributes for a properpty when you do not list any in objective C?</p>
  
  <p>Such as for example if I wrote this:</p>
  
  <pre><code>@property float value;
  </code></pre>
  
  <p>What would the defaults be, like is it read only, does it retain...etc.?</p>