what is the syntax to embed css file in html code example

Example 1: add css to an html file

<link rel=“stylesheet” type=“text/css” href=“style.css” />

Example 2: how to use css

<link rel="stylesheet" href="stylesheet.css">
<div class="mydiv"></div>
<style>
.mydiv {
background-color: /*Color*/;
color: /*Another color*/;
}
</style>