The markup language that we use to structure and give meaning to our web content, for example:
.css, .js, .png, etc)A language of style rules that we use to apply styling to our HTML content, such as
The official programming language of the browser. It does the things HTML and CSS can't, such as:

Source: Learn JavaScript in 1 Hour
Source: W3Schools

Source: Learn JavaScript in 1 Hour
<html>
<head>
<title>Hello World!</title>
<script src="js/app.js" type="module"></script>
</head>
<body>
<h1>Hello world!</h1>
</body>
</html><script> is added to the <head> element</script> closing tag is required, because reasonstype="module" turns on modern featuresYou will often see these in examples/documentation online.
<html>
<head>
<title>Hello world!</title>
</head>
<body>
<h1>Hello world!</h1>
<script>
console.log("Hello world!");
</script>
</body>
</html><script> element goes just before the </body><html>
<head>
<title>Hello Font Awesome!</title>
<script src="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/6.2.0/js/all.min.js"></script>
<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/6.2.0/css/all.min.css">
</head>
<body>
<i class="fa-brands fa-square-js"></i>
</body>
</html>"cdn [your favourite tool]"
myvar is not the same as myVarlastNamelast_nameborder-topborderTop=, +, *, etc)const total = 99.99 * 0.05;const total=99.99*0.05;// Single line comment
/*
Multi-line
comment
*/