title: command line byte sequence
body: <p>How do you express a byte sequence from the command line? 
  i.e like you would in PHP with the following:</p>
  
  <pre><code>&lt;?php
  echo "\xC2\xA3"
  </code></pre>
  
  <p>usage: for passing a Unicode string to a script or program. The above example is the UK pound sign "£" </p>