[brap]

There are ways to handle side effects with pure functions only (it’s kind of cheating, because the actual side effects are performed by the non-pure runtime/framework that’s abstracted away, while the pure user code just defines when to perform them and how to respond to them). It’s possible, but it gets very awkward very fast. I wouldn’t use FP for any part of the code that deals with IO.

[lukaslalinsky]

That was the question, what would you use FP for?