Do some deep learning. It's very straightfoward, and you only need some trivial IO. Writing a programming language in APL is not for the faint of heart - co-df

Do some deep learning. It's very straightfoward, and you only need some trivial IO. Writing a programming language in APL is not for the faint of heart - co-dfns is, alongside it's performance goals, to show that compilers aren't necessarily a bad fit for APL.