font awesome icons line in w3schools code example
Example: how to add icons in html
<html>
<head>
<script src="https://kit.fontawesome.com/yourcode.js"></script>
<!--Get your code at fontawesome.com-->
</head>
<body>
<html>
<head>
<script src="https://kit.fontawesome.com/yourcode.js"></script>
<!--Get your code at fontawesome.com-->
</head>
<body>