title: How do I initialize an observable property in RxSwift?
body: <p>I find this very puzzling. Coming from ReactiveCocoa I would expect something like this possible.</p>
  
  <p><a href="https://i.stack.imgur.com/UZFpB.png" rel="noreferrer"><img src="https://i.stack.imgur.com/UZFpB.png" alt="enter image description here"></a></p>
  
  <p>How can I initialize the RxSwift observable to 5?</p>