Haskell: negate: Change the sign of a number

Haskell provides negate function, which change the sign of a number. Following is the signature of negate function.

Prelude> :t negate
negate :: Num a => a -> a

As you see the signature, negate function takes any value, which is of type number and change the sign.

Prelude> negate 10
-10
Prelude> negate (-10)
10
Prelude> negate 10.01
-10.01
Prelude> negate (-10.01)
10.01

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