ashutosh dimri wrote:
func [] = [] func (x:xs) |(ord x > 57) = ((ord x)-87):func xs |otherwise = ((ord x)-48):func xs
Your problem is with the type of 'func'. *Main> :t func func :: [Char] -> [Int] 'Int' is a 32-bit type, on most systems. The thing that has forced your type to Int is your use of ord, because ord is defined to produce Ints: *Main> :t ord ord :: Char -> Int We can use 'fromIntegral' to convert an Int to any other numeric type: func [] = [] func (x:xs) |(ord x > 57) = ((fromIntegral.ord $ x)-87):func xs |otherwise = ((fromIntegral.ord $ x)-48):func xs And now 'func' has the more general type: *Main> :t func func :: (Num a) => [Char] -> [a] (i.e. func works on any numeric type 'a'). and now it works for you on very large values: *Main> mul.func $ "eeeeeeeeee" 1026210852590 Hope that helps, Jules