where do i put my jquery code go in server file code example

Example 1: html include jquery

<!-- Wrap inside the head tag -->
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.5.1/jquery.min.js"></script>

Example 2: jquery implement in html

<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.4.1/jquery.min.js"></script>