Which programming language is most important for learning hacking or cybersecurity?

Answer 1

I recommend you to start with

- python - c++
- Linux - networking

And play CTF games they will help you to practice hunting and exploiting.

Answer 2

In web, javascript can be used as hacking language.
In addition to this, python, SQL and php are among the top 5 hacking languages and also help in cybersecurity.

There are many courses like ethical hacking, cybersecurity and many others which can help you.

Answer 3

Python, C, ruby