What Does the Root Null Mean

-null-, root. -null- comes from Latin, where it has the meaning “none; not one. ” This meaning is found in such words as: annul, null, nullify.

What does root == NULL mean?

root is a pointer pointing to a node in the tree. If you assign NULL to root that doesn’t mean the node is deleted but it just breaks the link of root pointer and node it’s pointing to but the parents either left or right pointer is still pointing to that node. You need to free (root) in order to delete it.

What does NULL mean in front of name?

It means that there is no value associated with name . You can also think of it as the absence of data or simply no data.