put a css link code example
Example 1: how to link css to html
<link rel="stylesheet" href="mystyle.css">
Example 2: how to add a css file in html
<!DOCTYPE html>
<html>
<head>
<link rel="stylesheet" href="styles.css">
</head>
<body>
<h1>This is a heading</h1>
<p>This is a paragraph.</p>
</body>
</html>