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.
162 lines
7.0 KiB
HTML
162 lines
7.0 KiB
HTML
14 years ago
|
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
|
||
|
|
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
|
||
|
|
<html>
|
||
|
|
<head>
|
||
|
|
<title>Arduino - Double </title>
|
||
|
|
<link rel="shortcut icon" type="image/x-icon" href="http://arduino.cc/en/favicon.png">
|
||
|
|
<link rel='stylesheet' href='arduinoUno.css' type='text/css' />
|
||
|
|
<!--HeaderText--><style type='text/css'><!--
|
||
|
|
ul, ol, pre, dl, p { margin-top:0px; margin-bottom:0px; }
|
||
|
|
code { white-space: nowrap; }
|
||
|
|
.vspace { margin-top:1.33em; }
|
||
|
|
.indent { margin-left:40px; }
|
||
|
|
.outdent { margin-left:40px; text-indent:-40px; }
|
||
|
|
a.createlinktext { text-decoration:none; border-bottom:1px dotted gray; }
|
||
|
|
a.createlink { text-decoration:none; position:relative; top:-0.5em;
|
||
|
|
font-weight:bold; font-size:smaller; border-bottom:none; }
|
||
|
|
img { border:0px; }
|
||
|
|
|
||
|
|
span.anchor {
|
||
|
|
float: left;
|
||
|
|
font-size: 10px;
|
||
|
|
margin-left: -10px;
|
||
|
|
width: 10px;
|
||
|
|
position:relative; top:-0.1em;
|
||
|
|
text-align: center;
|
||
|
|
}
|
||
|
|
span.anchor a { text-decoration: none; }
|
||
|
|
span.anchor a:hover { text-decoration: underline; }
|
||
|
|
ol.toc { text-indent:-20px; list-style: none; }
|
||
|
|
ol.toc ol.toc { text-indent:-40px; }
|
||
|
|
div.tocfloat { font-size: smaller; margin-bottom: 10px;
|
||
|
|
border-top: 1px dotted #555555; border-bottom: 1px dotted #555555;
|
||
|
|
padding-top: 5px; padding-bottom: 5px;
|
||
|
|
width: 38%; float: right; margin-left: 10px; clear: right;
|
||
|
|
margin-right:-13px; padding-right: 13px; padding-left: 13px;
|
||
|
|
background-color: #eeeeee; }
|
||
|
|
div.toc { font-size: smaller;
|
||
|
|
padding: 5px; border: 1px dotted #cccccc;
|
||
|
|
background: #f7f7f7;
|
||
|
|
margin-bottom: 10px; }
|
||
|
|
div.toc p { background-color: #f9f6d6;
|
||
|
|
margin-top:-5px; padding-top: 5px;
|
||
|
|
margin-left:-5px; padding-left: 5px;
|
||
|
|
margin-right:-5px; padding-right: 5px;
|
||
|
|
padding-bottom: 3px;
|
||
|
|
border-bottom: 1px dotted #cccccc; }.editconflict { color:green;
|
||
|
|
font-style:italic; margin-top:1.33em; margin-bottom:1.33em; }
|
||
|
|
|
||
|
|
table.markup { border: 2px dotted #ccf; width:90%; }
|
||
|
|
td.markup1, td.markup2 { padding-left:10px; padding-right:10px; }
|
||
|
|
td.markup1 { border-bottom: 1px solid #ccf; }
|
||
|
|
div.faq { margin-left:2em; }
|
||
|
|
div.faq p.question { margin: 1em 0 0.75em -2em; font-weight:bold; }
|
||
|
|
div.faq hr { margin-left: -2em; }
|
||
|
|
|
||
|
|
.frame
|
||
|
|
{ border:1px solid #cccccc; padding:4px; background-color:#f9f9f9; }
|
||
|
|
.lfloat { float:left; margin-right:0.5em; }
|
||
|
|
.rfloat { float:right; margin-left:0.5em; }
|
||
|
|
a.varlink { text-decoration:none; }
|
||
|
|
|
||
|
|
--></style><script type="text/javascript">
|
||
|
|
function toggle(obj) {
|
||
|
|
var elstyle = document.getElementById(obj).style;
|
||
|
|
var text = document.getElementById(obj + "tog");
|
||
|
|
if (elstyle.display == 'none') {
|
||
|
|
elstyle.display = 'block';
|
||
|
|
text.innerHTML = "hide";
|
||
|
|
} else {
|
||
|
|
elstyle.display = 'none';
|
||
|
|
text.innerHTML = "show";
|
||
|
|
}
|
||
|
|
}
|
||
|
|
</script> <meta name='robots' content='index,follow' />
|
||
|
|
|
||
|
|
<meta name="verify-v1" content="TtxFIEJAB6zdJ509wLxjnapQzKAMNm9u0Wj4ho6wxIY=" />
|
||
|
|
</head>
|
||
|
|
<body>
|
||
|
|
<div id="page">
|
||
|
|
<!--PageHeaderFmt-->
|
||
|
|
<div id="pageheader">
|
||
|
|
<div class="title"><a href='http://arduino.cc/en'>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">
|
||
|
|
<div id="navbar">
|
||
|
|
<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>
|
||
|
|
<div id="navbar_external">
|
||
|
|
<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>
|
||
|
|
</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='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>double</h2>
|
||
|
|
<h4>Desciption</h4>
|
||
|
|
<p>Double precision floating point number. Occupies 4 bytes.
|
||
|
|
</p>
|
||
|
|
<p class='vspace'></p><p>The double implementation on the Arduino is currently exactly the same as the float, with no gain in precision.
|
||
|
|
</p>
|
||
|
|
<p class='vspace'></p><h4>Tip</h4>
|
||
|
|
<p>Users who borrow code from other sources that includes double variables may wish to examine the code to see if the implied precision is different from that actually achieved on the Arduino.
|
||
|
|
</p>
|
||
|
|
<p class='vspace'></p><h4>See:</h4>
|
||
|
|
<ul><li><a class='wikilink' href='Float.html'>float</a>
|
||
|
|
</li></ul><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>
|
||
|
|
|
||
|
|
|
||
|
|
<!-- AddThis Button BEGIN -->
|
||
|
|
<script type="text/javascript">var addthis_language = "en";
|
||
|
|
</script>
|
||
|
|
<div class="addthis_container addthis_toolbox addthis_default_style" addthis:url="Double" addthis:title="Arduino Wiki English">
|
||
|
|
<a href="http://www.addthis.com/bookmark.php?v=250&username=arduinoteam" class="addthis_button_compact">Share</a><span
|
||
|
|
class="addthis_separator">|</span><a class="addthis_button_email"></a><a class="addthis_button_favorites"></a><a class="addthis_button_print"></a><a
|
||
|
|
class="addthis_button_facebook"></a><a class="addthis_button_twitter"></a><script type="text/javascript"
|
||
|
|
src="http://s7.addthis.com/js/250/addthis_widget.js#username=arduinoteam"></script></div>
|
||
|
|
<!-- AddThis Button END -->
|
||
|
|
|
||
|
|
</div>
|
||
|
|
<!--PageFooterFmt-->
|
||
|
|
<div id="pagefooter">
|
||
|
|
©Arduino |
|
||
|
|
<a href=.html'#'>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>
|