title: What is "operator<<" called?
body: <p>I know the names of most of the operators but not sure what <code>operator&lt;&lt;</code> and <code>operator&gt;&gt;</code> are called.</p>
  
  <p>i.e.</p>
  
  <pre><code>operator=() // the assignment operator
  operator==() // the equality of comparison operator
  operator++() // the increment operator
  operator--() // decrement operator etc.
  operator&lt;() // the less-than operator
  </code></pre>
  
  <p>and so forth...</p>