Answers for "where is script tag in html"

script src tag in html

<script type="text/javascript" 
         src="file.js">  
</script>

script tag with type html

<script type="text/javascript">
  /*Detects that you are using javascript or text*/
</script>

how to add script in html head

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

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