Once you install the Raspberry Pi OS, you can program in various languages like Python, Scratch ... one of them being a code editor. There are those already installed by default, and they work ...

To start writing and running Python programs locally on your device, you must have Python installed and an IDE (Integrated ...

There’s everything from C to Objective-C, Swift, JavaScript, Python ... code editors you’ll find anywhere. Textastic is a great iOS citizen too, supporting the Files app, drag and drop, printing, ...