title: What does the & symbol mean in Objective-C?
body: <p>What does the <code>&amp;</code> symbol mean in Objective-C? I am currently looking at data constucts and am getting really confused by it.</p>
  
  <p>I have looked around the web for it but have not found an answer at all. I know this is possibly a basic Objective-C concept, but I just can't get my head around it.</p>
  
  <p>For example:</p>
  
  <pre><code>int *pIntData = (int *)&amp;incomingPacket[0];
  </code></pre>
  
  <p>What is the code doing with incoming packet here?</p>