Extracting number from a string
<p>What is the best way to get the number from a string.</p>

<p>The string will always start with <code>n</code> and end with any number i.e.:</p>

<pre><code>n1
n2
n3
n10
n100
n1000
n99999
n9999999999999
</code></pre>

<p>and so on.</p>
