title: How to check that float property of managed object is nil?
body: <p>Score is NSManagedObject. score.latitude is an NSNumber, which actually is a float value.</p>
  
  <pre><code>NSLog(@"%f", [score.latitude floatValue]);
  </code></pre>
  
  <p>shows <strong>0.000000</strong>.</p>
  
  <p>Construction I use to check for nil:</p>
  
  <p>if (score.latitude == nil)</p>
  
  <p>doesn't work.</p>