What is the meaning of xor = (/=)?

Question

I found the code of logical gate xor written in Haskell, but I don't know what does this " (/=) " mean!

xor :: Bool -> Bool -> Bool
xor = (/=)

Answer 1

(/=):: Eq a => a -> a -> Bool is a function defined in the Eq typeclass. It tests if two items are different and returns True in that case. For Bool s, it thus checks if the first bool is different than the other bool, which is what a xor gate does:

x	y	x /= y	x `xor` y
False	False	False	False
False	True	True	True
True	False	True	True
True	True	False	False

Answer 2

/= is the not equal operator. It is equivalent to xor for booleans, since xor is only true when the booleans have different values.