To add class, use nth-child(odd) and nth-child(even). Following is the code −
Example
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
<link rel="stylesheet" href="//code.jquery.com/ui/1.12.1/themes/base/jquery-ui.css">
<script src="https://code.jquery.com/jquery-1.12.4.js"></script>
<script src="https://code.jquery.com/ui/1.12.1/jquery-ui.js"></script>
</head>
<body>
<section class="subjects">
<article class="subjectName ">MongoDB</article>
<article class="subjectName ">Javascript</article>
<article class="subjectName ">Java</article>
<article class="subjectName ">MySQL</article>
</section>
<style>
.subjectName:nth-child(odd) {
color: blue;
}
.subjectName:nth-child(even) {
color: purple;
}
</style>
</body>
</html>To run the above program, save the file name anyName.html(index.html) and right click on the file and select the option open with live server in VS code editor.
Output
