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SQL Tutorial SQL is a standard language for storing, manipulating and retrieving data in databases.

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

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

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 …

We recommend reading this tutorial, in the sequence listed in the left menu. C++ is an object oriented language and some concepts may be new. Take breaks when needed, and go over …

This tutorial follows Bootstrap 3, which was released in 2013. However, we also cover newer versions; Bootstrap 4 (released 2018) and Bootstrap 5 (released 2021).

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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.

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