title: When do you have to use @property and @synthesize in the iPhone SDK?
body: <p>When do you have to use <code>@property</code> and <code>@synthesize</code> in the iPhone SDK? And why use <code>@property</code> and <code>@synthesize</code>?
  I was studying property, but I can't get a correct idea. What would some examples for illustrating this be?</p>