title: Arduino print Syntax Serial << '[' << RSP_SUCCESS << ']' << endl;
body: <p>I am working on Io Rodeo Colorimeter sensor board I get an Arduino code and when I see the Arduino code then I find:</p>
  
  <pre><code>Serial &lt;&lt; '[' &lt;&lt; RSP_SUCCESS;
  Serial &lt;&lt; ',' &lt;&lt; _DEC(colorimeter.frequency.red);
  Serial &lt;&lt; ',' &lt;&lt; _DEC(colorimeter.frequency.green);
  Serial &lt;&lt; ',' &lt;&lt; _DEC(colorimeter.frequency.blue);
  Serial &lt;&lt; ',' &lt;&lt; _DEC(colorimeter.frequency.white);
  </code></pre>
  
  <p>this type of syntax I think this is print syntax but programme cannot print anything?</p>