Question

This is a function to generate a list of given number of random numbers within a range, but I’m confused on how to call on this function. I think a seed is needed for StdGen, but really appreciate if someone can tell how exactly to call this function.

randomList :: (Random a) => (a,a) -> Int -> StdGen -> [a]
randomList bnds n = take n . randomRs bnds

Answer 1

Sample:

main :: IO ()
main = do g <- getStdGen
          print (randomList (1, 100) 5 g :: [Integer])

will output e.g.

[42,42,15,7]

The g is the random number generator, in this case the “global random number generator”.
Here’s the documentation