HTML is an abbreviation of HyperText Markup Language, is a programming language used when creating web pages. A web browser, such as Internet Explorer, Google Chrome and Safari reads HTML code and displays a web page as intended, on the screen.
Web standards, such as HTML, are important; the development of web pages is simplified and web programmers will be able to understand another developer’s code. Standard HTML code also helps where you may use different web browsers across various technology , but the web pages will still be displayed in the way in which they were intended, regardless of the platform.
Greenfoot is an object-oriented programming (OOP) can be viewed as a collection of objects that communicate with each other.
Greenfoot teaches object orientation with Java. You can create 'actors' which live in 'worlds' to build games, simulations, and other graphical programs.
Greenfoot is visual and interactive. The actors are programmed in standard Java code, enabling you to program in a traditional text-based language (like Visual Basic). However, you can then run your code and immediately see your 'actors' interacting and moving.