There's no reason that you can't do this. Of course, you're not going to be able to just simply return a list of random numbers. But you can get a Rand [Int] or

There's no reason that you can't do this. Of course, you're not going to be able to just simply return a list of random numbers. But you can get a Rand [Int] or whatever and then evaluate it in an IO monad using evalRandIO.