Haskell Help

[DigitalDreams]

Hi All,

I am currently learning haskell and trying to make a small program that defines the following gates: AND,OR,NAND,NOR,NOT,XOR

so far i have the following code below:

but for some reason the not function works on its own, but when i put it with the following code below, i get the following error.

Syntax error in input (unexpected `=`)

It would be great if someone code have a look and tell me what i have done wrong, Thanks

> and :: Bool -> Bool -> Bool
> and a b = a&&b

> or :: Bool -> Bool -> Bool
> or a b = a||b

> not :: Bool -> Bool
> not True = False
> not False = True

> nand :: Bool -> Bool -> Bool
> nand a b = not (a `and` b)

> nor :: Bool -> Bool -> Bool
> nor a b = not (a `and` b)

> xor :: Bool -> Bool -> Bool
> xor a b = (a `or` b) `and` (not (a `and` b))

[Twey]

and, or, and not are already defined in the Prelude. You have to explicitly hide them before defining your own:

> module Main where
> import Prelude hiding (and, or, not)