title: "std::endl" vs "\n"
body: <p>Many C++ books contain example code like this...</p>
  
  <pre><code>std::cout &lt;&lt; "Test line" &lt;&lt; std::endl;
  </code></pre>
  
  <p>...so I've always done that too. But I've seen a lot of code from working developers like this instead:</p>
  
  <pre><code>std::cout &lt;&lt; "Test line\n";
  </code></pre>
  
  <p>Is there a technical reason to prefer one over the other, or is it just a matter of coding style?</p>