What's the meaning of F(string) in C++?
<p>Currently I'm writing C++ code on Arduino. In an example, I find a expression</p>

<pre><code>Serial.print(F("Disconnected from central:"));
</code></pre>

<p>It's obvious that this statement is used to send string to the serial, but why it uses F(string) instead of using string directly?</p>

<p>I try to google it but with no results. If someone know it, I would be greatly appreciated.</p>