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<h1>parseFloat</h1>
<h2>Summary</h2>
<p>Converts a string to a floating-point number.</p>
<h2>Syntax</h2>
<pre><code>parseFloat( numString )
</code></pre>
<h2>Examples</h2>
<pre><code class="js"><span class="hljs-built_in">parseFloat</span>(<span class="hljs-string">"123.45"</span>) <span class="hljs-comment">// returns 123.45</span>
<span class="hljs-built_in">parseFloat</span>(<span class="hljs-string">"abc"</span>) <span class="hljs-comment">// returns NaN</span>
<span class="hljs-built_in">parseFloat</span>(<span class="hljs-string">"1.2abc"</span>) <span class="hljs-comment">// returns 1.2</span>
</code></pre>
<h2>Remarks</h2>
<p>The required numString argument is a string that contains a floating-point number.</p>
<p>The <strong>parseFloat</strong> function returns a numerical value equal to the number contained in numString. If no prefix of numString can be successfully parsed into a floating-point number, <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/parseInt">parseInt Function</a></li>
<li><a href="/docs/javascript/String">String Object</a></li>
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<li><p>Microsoft Developer Network: <a href="http://msdn.microsoft.com/en-us/library/ie/d5hbbd4z(v=vs.94).aspx">Article</a></p>
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