[frik]

All I meant is IO (aka input/output) can have side effects outside of the scope of the language environment. Haskell has the IO type to encoding those this side effects: https://wiki.haskell.org/Introduction_to_IO

[codygman]

I haven't decided yet, check out this link to decide for yourself:

https://leanpub.com/purescript/read#leanpub-auto-the-eff-mon...