Hi, I have tried on the console to write x <- randomRIO(1,10) :t x Everythings fine and the type of x is x :: Integer Now I have tried to write a Method which gives me a Number of random numbers the same way but it doesn't work. randomList :: Int -> [Integer] randomList 0 = [] randomList n = do r <- randomRIO (1, 10) r:randomList(n-1) It says Couldn't match expected type `IO t' against inferred type `[t]' r <- randomRIO (1,10) causes an error. But why does it work on the console? Is there a way to solve it another way? -- View this message in context: http://www.nabble.com/Convert-IO-Int-to-Int-tp23940249p23960652.html Sent from the Haskell - Haskell-Cafe mailing list archive at Nabble.com.