You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
89 lines
4.5 KiB
HTML
89 lines
4.5 KiB
HTML
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
|
|
<html>
|
|
<head>
|
|
<title>Arduino - Comments </title>
|
|
<link rel='stylesheet' href='arduino.css' type='text/css' />
|
|
<meta name="verify-v1" content="TtxFIEJAB6zdJ509wLxjnapQzKAMNm9u0Wj4ho6wxIY=" />
|
|
</head>
|
|
<body>
|
|
<div id="page">
|
|
<!--PageHeaderFmt-->
|
|
<div id="pageheader">
|
|
<div class="title"><a href="http://www.arduino.cc"/>Arduino</a></div>
|
|
<div class="search">
|
|
<!-- SiteSearch Google -->
|
|
<FORM method=GET action="http://www.google.com/search">
|
|
<input type=hidden name=ie value=UTF-8>
|
|
<input type=hidden name=oe value=UTF-8>
|
|
<INPUT TYPE=text name=q size=25 maxlength=255 value="">
|
|
<INPUT type=submit name=btnG VALUE="search">
|
|
<input type=hidden name=domains value="http://www.arduino.cc/">
|
|
<input type=hidden name=sitesearch value="http://www.arduino.cc/">
|
|
</FORM>
|
|
<!-- SiteSearch Google -->
|
|
</div>
|
|
</div>
|
|
<!--/PageHeaderFmt-->
|
|
<!--PageLeftFmt-->
|
|
<div id="pagenav" style="text-align: right">
|
|
<div style="float: left;">
|
|
<p><a class='wikilink' href='http://arduino.cc/en/Main/Buy'>Buy</a>
|
|
|
|
|
<a class='wikilink' href='http://arduino.cc/en/Main/Software'>Download</a>
|
|
|
|
|
<a class='wikilink' href='Guide_index.html'>Getting Started</a>
|
|
|
|
|
<a class='wikilink' href='http://arduino.cc/en/Tutorial/HomePage'>Learning</a>
|
|
|
|
|
<a class='wikilink' href='index.html'>Reference</a>
|
|
|
|
|
<a class='wikilink' href='http://arduino.cc/en/Main/Hardware'>Hardware</a>
|
|
|
|
|
<a class='wikilink' href='FAQ.html'>FAQ</a>
|
|
</p>
|
|
<p class='vspace'></p>
|
|
|
|
</div>
|
|
<a class="urllink" href="http://www.arduino.cc/blog/" rel="nofollow">Blog »</a> |
|
|
<a class="urllink" href="http://www.arduino.cc/cgi-bin/yabb2/YaBB.pl" rel="nofollow">Forum »</a> |
|
|
<a class="urllink" href="http://www.arduino.cc/playground/" rel="nofollow">Playground »</a>
|
|
</div>
|
|
<!--/PageLeftFmt-->
|
|
<div id="pagetext">
|
|
<!--PageText-->
|
|
<div id='wikitext'>
|
|
<p><strong>Reference</strong> <a class='wikilink' href='index.html'>Language</a> (<a class='wikilink' href='Extended.html'>extended</a>) | <a class='wikilink' href='Libraries.html'>Libraries</a> | <a class='wikilink' href='Comparison.html'>Comparison</a> | <a class='wikilink' href='Changes.html'>Changes</a>
|
|
</p>
|
|
<p class='vspace'></p><h2>Comments</h2>
|
|
<p>Comments are lines in the program that are used to inform yourself or others about the way the program works. They are ignored by the compiler, and not exported to the processor, so they don't take up any space on the Atmega chip.
|
|
</p>
|
|
<p class='vspace'></p><p>Comments only purpose are to help you understand (or remember) how your program works or to inform others how your program works.
|
|
There are two different ways of marking a line as a comment:
|
|
</p>
|
|
<p class='vspace'></p><h4>Example</h4>
|
|
<pre> x = 5; // This is a single line comment. Anything after the slashes is a comment
|
|
// to the end of the line
|
|
|
|
/* this is multiline comment - use it to comment out whole blocks of code
|
|
|
|
if (gwb == 0){ // single line comment is OK inside a multiline comment
|
|
x = 3; /* but not another multiline comment - this is invalid */
|
|
}
|
|
// don't forget the "closing" comment - they have to be balanced!
|
|
*/
|
|
|
|
</pre>
|
|
<p class='vspace'></p><p><strong>Tip</strong><br />When experimenting with code, "commenting out" parts of your program is a convenient way to remove lines that may be buggy. This leaves the lines in the code, but turns them into comments, so the compiler just ignores them. This can be especially useful when trying to locate a problem, or when a program refuses to compile and the compiler error is cryptic or unhelpful.
|
|
</p>
|
|
<p class='vspace'></p><p><a class='wikilink' href='index.html'>Reference Home</a>
|
|
</p>
|
|
<p class='vspace'></p><p><em>Corrections, suggestions, and new documentation should be posted to the <a class='urllink' href='http://www.arduino.cc/cgi-bin/yabb2/YaBB.pl?board=swbugs' rel='nofollow'>Forum</a>.</em>
|
|
</p>
|
|
<p class='vspace'></p><p>The text of the Arduino reference is licensed under a
|
|
<a class='urllink' href='http://creativecommons.org/licenses/by-sa/3.0/' rel='nofollow'>Creative Commons Attribution-ShareAlike 3.0 License</a>. Code samples in the reference are released into the public domain.
|
|
</p>
|
|
</div>
|
|
|
|
</div>
|
|
<!--PageFooterFmt-->
|
|
<div id="pagefooter">
|
|
<a href='#'>Edit Page</a> | <a href='#'>Page History</a> | <a href='#' target='_blank'>Printable View</a> | <a href='http://arduino.cc/en/Site/AllRecentChanges'>All Recent Site Changes</a>
|
|
</div>
|
|
<!--/PageFooterFmt-->
|
|
</div>
|
|
</body>
|
|
</html>
|