function.exp.html
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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"><html> <head> <title>Calculates the exponent of e</title> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> </head> <body><div style="text-align: center;"> <div class="prev" style="text-align: left; float: left;"><a href="function.deg2rad.html">deg2rad</a></div> <div class="next" style="text-align: right; float: right;"><a href="function.expm1.html">expm1</a></div> <div class="up"><a href="ref.math.html">Math Functions</a></div> <div class="home"><a href="index.html">PHP Manual</a></div></div><hr /><div id="function.exp" class="refentry"> <div class="refnamediv"> <h1 class="refname">exp</h1> <p class="verinfo">(PHP 4, PHP 5)</p><p class="refpurpose"><span class="refname">exp</span> — <span class="dc-title">Calculates the exponent of <b><tt>e</tt></b></span></p> </div> <div class="refsect1 description"> <h3 class="title">Description</h3> <div class="methodsynopsis dc-description"> <span class="type">float</span> <span class="methodname"><b><b>exp</b></b></span> ( <span class="methodparam"><span class="type">float</span> <tt class="parameter">$arg</tt></span> )</div> <p class="para rdfs-comment"> Returns <b><tt>e</tt></b> raised to the power of <i><tt class="parameter">arg</tt></i>. </p> <blockquote><p><b class="note">Note</b>: 'e' is the base of the natural system of logarithms, or approximately 2.718282. <br /> </p></blockquote> </div> <div class="refsect1 parameters"> <h3 class="title">Parameters</h3> <p class="para"> <dl> <dt> <span class="term"><i><tt class="parameter">arg</tt></i></span> <dd> <p class="para"> The argument to process </p> </dd> </dt> </dl> </p> </div> <div class="refsect1 returnvalues"> <h3 class="title">Return Values</h3> <p class="para"> 'e' raised to the power of <i><tt class="parameter">arg</tt></i> </p> </div> <div class="refsect1 examples"> <h3 class="title">Examples</h3> <p class="para"> <div class="example"> <p><b>Example #1 <b>exp()</b> example</b></p> <div class="example-contents"><div class="phpcode"><code><span style="color: #000000"><span style="color: #0000BB"><?php<br /></span><span style="color: #007700">echo </span><span style="color: #0000BB">exp</span><span style="color: #007700">(</span><span style="color: #0000BB">12</span><span style="color: #007700">) . </span><span style="color: #DD0000">"\n"</span><span style="color: #007700">;<br />echo </span><span style="color: #0000BB">exp</span><span style="color: #007700">(</span><span style="color: #0000BB">5.7</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">?></span></span></code></div> </div> <div class="example-contents"><p>The above example will output:</p></div> <div class="example-contents"><pre><div class="cdata"><pre>1.6275E+005298.87</pre></div> </pre></div> </div> </p> </div> <div class="refsect1 seealso"> <h3 class="title">See Also</h3> <p class="para"> <ul class="simplelist"> <li class="member"><a href="function.log.html" class="function" rel="rdfs-seeAlso">log()</a></li> <li class="member"><a href="function.pow.html" class="function" rel="rdfs-seeAlso">pow()</a></li> </ul> </p> </div></div><hr /><div style="text-align: center;"> <div class="prev" style="text-align: left; float: left;"><a href="function.deg2rad.html">deg2rad</a></div> <div class="next" style="text-align: right; float: right;"><a href="function.expm1.html">expm1</a></div> <div class="up"><a href="ref.math.html">Math Functions</a></div> <div class="home"><a href="index.html">PHP Manual</a></div></div></body></html>⌨️ 快捷键说明
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