[Haskell-beginners] A tree code

[bahadýr altan]

Hello. There is a code below and I couldn't understand it myself. Could you help me with that please?  I especially have no idea about "data Tree alpha = Empty | Node " part.


data Tree alpha = Empty | Node ( alpha ,Tree alpha , Tree alpha )
x = Node (1,Node (2,Empty ,Empty),Node(3,Empty ,Empty))
y = Node(3,Empty ,Empty)

Thanks in advance
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