how to add font-family link in css code example

Example 1: import google font css

@import url('https://fonts.googleapis.com/css?family=Open+Sans&display=swap');
.generic_class {
	font-family: 'Open Sans', sans-serif;
}

Example 2: google font import

<!-- To import google font add this to the head of your HTML then you can use use the imported font family in your CSS file -->

<link rel="preconnect" href="https://fonts.gstatic.com">
<link href="https://fonts.googleapis.com/css2?family=Open+Sans&display=swap" rel="stylesheet">