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HTML Exercises Many chapters in this tutorial end with an exercise where you can check your level of knowledge.

Click on the "Try it Yourself" button to see how it works. We recommend reading this tutorial in the sequence listed in the left menu.

Python Exercises Many chapters in this tutorial end with an exercise where you can check your level of knowledge.

Click on the "Run example" button to see how it works. We recommend reading this tutorial, in the sequence listed in the left menu. C++ is an object oriented language and some concepts may …

Learn JavaScript The programming language of the Web. JavaScript is easy to learn. This tutorial covers everything from basic JavaScript up to the latest 2025 version. Start learning …

Examples in Each Chapter This CSS tutorial contains over 700 CSS examples. With our online editor, you can edit the CSS, and click on a button to view the result.

W3Schools offers free online tutorials, references and exercises in all the major languages of the web. Covering popular subjects like HTML, CSS, JavaScript, Python, SQL, Java, and many, …

Click on the "Run example" button to see how it works. We recommend reading this tutorial, in the sequence listed in the left menu.

MongoDB is a document database. It stores data in a type of JSON format called BSON. If you are unfamiliar with JSON, check out our JSON tutorial. A record in MongoDB is a document, …