A programming language that does not allow IO. Haskell is not a pure language

Posted by TheIronKnuckle on Programmers See other posts from Programmers or by TheIronKnuckle
Published on 2011-11-22T08:28:45Z Indexed on 2011/11/22 10:24 UTC
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object-oriented

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functional-programming

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haskell

(I asked this on Stack Overflow and it got closed as off-topic, I was a bit confused until I read the FAQ, which discouraged subjective theoratical debate style questions. The FAQ here doesn't seem to have a problem with it and it sounds like this is a more appropriate place to post. If this gets closed again, forgive me, I'm not trying to troll)

Are there any 100% pure languages (as I describe in the Stack Overflow post) out there already and if so, could they feasibly be used to actually do stuff? i.e. do they have an implementation? I'm not looking for raw maths on paper/Pure lambda calculus. However Pure lambda calculus with a compiler or a runtime system attached is something I'd be interested in hearing about.

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