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<h1>parseInt</h1>
<h2>Summary</h2>
<p>Converts a string to an integer.</p>
<h2>Syntax</h2>
<pre><code>parseInt( numString , [ radix ])
</code></pre>
<dl>
<dt><strong>numString</strong></dt>
<dd>Required. A string to convert into a number.
</dd>
<dt><strong>radix</strong></dt>
<dd>Optional. A value between 2 and 36 that specifies the base of the number in numString. If this argument is not supplied, strings with a prefix of ‘0x’ are considered hexadecimal. All other strings are considered decimal.
</dd>
</dl>
<h2>Examples</h2>
<pre><code class="js"><span class="hljs-built_in">parseInt</span>(<span class="hljs-string">"123.45"</span>); <span class="hljs-comment">// returns 123</span>
<span class="hljs-built_in">parseInt</span>(<span class="hljs-string">"abc"</span>); <span class="hljs-comment">// returns NaN</span>
<span class="hljs-built_in">parseInt</span>(<span class="hljs-string">"12abc"</span>); <span class="hljs-comment">// returns 12</span>
</code></pre>
<h2>Remarks</h2>
<p>The <strong>parseInt</strong> function returns an integer value equal to the number contained in numString. If no prefix of numString can be successfully parsed into an integer, <strong>NaN</strong> (not a number) is returned.</p>
<p>You can test for <strong>NaN</strong> using the <strong>isNaN</strong> function.</p>
<h2>See also</h2>
<h3>Other articles</h3>
<ul>
<li><a href="/docs/javascript/isNaN">isNaN Function</a></li>
<li><a href="/docs/javascript/parseFloat">parseFloat Function</a></li>
<li><a href="/docs/javascript/String">String Object</a></li>
<li><a href="/docs/javascript/Object/valueOf">valueOf Method (Object)</a></li>
</ul>
<h2>Attributions</h2>
<ul>
<li><p>Microsoft Developer Network: <a href="http://msdn.microsoft.com/en-us/library/ie/x53yedee(v=vs.94).aspx">Article</a></p>
</li>
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