HTML, CSS and other web technologies are also great ways to teach developers important, meaningful lessons about how to write code — lessons that programmers can apply to any popular programming ...

HTML provides the structure, content and layout, CSS adds style and design, and JavaScript adds functionality and interactivity.

How do I learn to code in HTML and CSS on my Mac? Web design is one of the most useful skills you can learn, and it’s easy to learn HTML and CSS (the two main pillars of web pages) in Mac OS X.