title: What does this operator mean? /=
body: <p>I have just come across some code with the line:</p>
  
  <pre><code>n /= 10;
  </code></pre>
  
  <p>I assumed it was a typo and removed the <code>/</code> to make it <code>n = 10</code>, but the program no longer works.</p>
  
  <p>Never seen this sort of operator before, anybody know?</p>