how to add script tag in html file code example

Example 1: how to add script in html head

<script src="script.js" defer></script>

<!--just add defer attribute so script will execute at last-->

Example 2: what is the use of script tag in html

<script>
  //Insert JS scripts here
  var html
  html = "You can use the <script> tag to incorporate JS code into your HTML code"
  console.log(html)
</script>