Hello @kartik,
This is how you link a JS file in HTML
<script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.7.1/jquery.min.js"></script>
<script> - tag is used to define a client-side script, such as a JavaScript.
type - specify the type of the script
src - script file name and path
Hope it helps!!
Thank you!!