How to select a particular value from a <select> element?
<p>I have come across <code>&lt;select&gt;</code> (drop down list) in HTML in the learning process. I learnt how to code a <code>&lt;select&gt;</code> drop down list.</p>

<p>How can I perform a particular action (in my case I am performing a mathematical operation) when a value in the <code>&lt;select&gt;</code> is chosen?</p>
