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

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

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).

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

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, …

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 …

The box-sizing property allows us to include the padding and border in the box's total width (and height), making sure that the padding stays inside of the box and that it does not break. You …

You will learn more about the use of conditional statements in the if...else chapter of this tutorial.

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, …