Does Php, Python and other program languages need to install first before editing on code editor?

Question

Feeling confused

Answer 1

You can edit any code in any editor without compilers or interpreters.
But if you want to run the code, you have to install all the required utilities, compilers, interpreters, libraries etc.
Some systems have them pre-installed.
You don't need to install JavaScript. To run it, you need only a browser, which is pre-installed on most systems with GUI.

Answer 2

Thanks a lot!