Generate a random integer in a range in Haskell without a seed

Question

How can I generate a random number in Haskell from a range (a, b) without using any seed?

The function should return an Int and not an IO Int. I have a function X t

Answer 1

fmap yourFunctionX $ randomRIO (a, b)

or

fmap (\x -> yourFunctionX aParam x anotherParam) $ randomRIO (a, b)

The result will then be of type IO whateverYourFunctionXReturns.

If you import Control.Applicative, you can say

yourFunctionX <$> randomRIO (a, b)

or

(\x -> yourFunctionX aParam x anotherParam) <$> randomRIO (a, b)

which you may find clearer