Here is a crystal REPL blog by @beta-ziliani , which i even never find it until today, after i built Crystal with interpreter enabled yesterday.
i consider Crystal community is very ignored the existence of REPL of Crystal, Newbile like me, all think REPL is still WIP, and still not usable.
But the in fact is, you can play almost everything simple syntax study use crystal i, and even, we are a debugger add to it, as the debugger added into ruby 3.1 by @ko1.
We are pry like feature in Crystal! even, the promot is pry>, but who(especial newbie) know it?
i am a HEAVY pry user, i even i write gem pryx, just for bundled with some nice feature, and make remote pry can listen use http ip:port when i use ruby to development API within docker container, but, after i read almost all document(except blog), no find clue about if REPL is ready and how to enable it.
So, i consider we must told people, crystal builtin with interpreter, and push people to use it, otherwise, no one use it.
Following is a PR relative to it, but no update since Jan 2022.
