Let's go!
\begin{haskellcode}
x :: Int
x = 3
-- how about this?
x = 5
-- Int vs Integer
n :: Integer
n = 12345678909876543219873409823349873498723498
d :: Double
d = 5.0
c :: Char
c = 'k'
s :: String
s = "Hello, world?"
\end{haskellcode}