Why we used (.) like that l.head or l.tail

[gk1293123]

why we used (.) like that l.head or l.tail

[tusharaggarwal272 (Tushar Aggarwal)]

Hello @gk1293123 like we are checking on the left Subtree and the right subtree so for that to access their head and tail we can do in this way.
That’s is why ‘.’ IS USED.