title: What does "&error" mean in Objective-C?
body: <blockquote>
    <p><strong>Possible Duplicate:</strong><br>
    <a href="https://stackoverflow.com/questions/8334518/why-is-errorerror-used-here-objective-c">why is “error:&amp;error” used here (objective-c)</a>  </p>
  </blockquote>
  
  
  
  <pre><code>AVCaptureDeviceInput *input = [AVCaptureDeviceInput deviceInputWithDevice:device
                                                                      error:&amp;error];
  </code></pre>
  
  <p>What does the <code>&amp;</code> symbol mean in the above code?  </p>