Final answer:
The course covers Python 3, which is the most current major version of Python, as Python 2 has been retired and Python 4 has not been released as of 2023.
Step-by-step explanation:
The course you're asking about covers Python 3. Python is a high-level, interpreted programming language known for its clear syntax and readability. It's currently one of the most popular programming languages, especially for beginners. As of my knowledge cutoff in 2023, Python 2 has been officially retired (end-of-life was January 1, 2020), and although Python 4 has been discussed, it has not been released. Therefore, Python 3 is the latest major version and is actively developed and maintained with frequent updates and a large community of developers.
It is noteworthy that Python 3 introduces many improvements over Python 2, such as better support for Unicode (text and characters from all writing systems), a more consistent language design, and a more modern standard library. For these reasons, among others, most educational resources and courses now focus on teaching Python 3.