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<title>Calculates the exponent of e</title>
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<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 <strong><code>e</code></strong></span></p>
</div>
<div class="refsect1 description" id="refsect1-function.exp-description">
<h3 class="title">Description</h3>
<div class="methodsynopsis dc-description">
<span class="type">float</span> <span class="methodname"><strong>exp</strong></span>
( <span class="methodparam"><span class="type">float</span> <code class="parameter">$arg</code></span>
)</div>
<p class="para rdfs-comment">
Returns <strong><code>e</code></strong> raised to the power of <em><code class="parameter">arg</code></em>.
</p>
<blockquote class="note"><p><strong class="note">Note</strong>:
<p class="para">
'<strong><code>e</code></strong>' is the base of the natural system of logarithms, or approximately
2.718282.
</p>
</p></blockquote>
</div>
<div class="refsect1 parameters" id="refsect1-function.exp-parameters">
<h3 class="title">Parameters</h3>
<p class="para">
<dl>
<dt>
<span class="term"><em><code class="parameter">arg</code></em></span>
<dd>
<p class="para">
The argument to process
</p>
</dd>
</dt>
</dl>
</p>
</div>
<div class="refsect1 returnvalues" id="refsect1-function.exp-returnvalues">
<h3 class="title">Return Values</h3>
<p class="para">
'e' raised to the power of <em><code class="parameter">arg</code></em>
</p>
</div>
<div class="refsect1 examples" id="refsect1-function.exp-examples">
<h3 class="title">Examples</h3>
<p class="para">
<div class="example" id="example-3458">
<p><strong>Example #1 <span class="function"><strong>exp()</strong></span> example</strong></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 screen">
<div class="cdata"><pre>
1.6275E+005
298.87
</pre></div>
</div>
</div>
</p>
</div>
<div class="refsect1 seealso" id="refsect1-function.exp-seealso">
<h3 class="title">See Also</h3>
<p class="para">
<ul class="simplelist">
<li class="member"> <span class="function"><a href="function.log.html" class="function" rel="rdfs-seeAlso">log()</a> - Natural logarithm</span></li>
<li class="member"> <span class="function"><a href="function.pow.html" class="function" rel="rdfs-seeAlso">pow()</a> - Exponential expression</span></li>
</ul>
</p>
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