title: What does " \t\r\n\a" stand for?
body: <p>I know what a delimiter is, but what does the string <code>&quot; \t\r\n\a&quot;</code> stand for in the example below?</p>
  <pre class="lang-c prettyprint-override"><code>#define DELIMITER &quot; \t\r\n\a&quot;
  </code></pre>