What other methods of tree traversal besides recursion do you know? What are the pros and cons of recursion and stack?

Besides recursion, tree traversal can be implemented using an explicit stack (iteratively) or a queue (for breadth-first traversal).

Methods of tree traversal without recursion:

• Using a stack to simulate recursive calls (e.g., depth-first traversal).
• Using a queue for breadth-first traversal (BFS).

Pros and cons of recursion:

• • Code is usually simpler and cleaner, easier to read and write.
• • Naturally reflects the structure of the tree.
• • Risk of stack overflow with deep recursion.
• • Less control over memory usage.

Pros and cons of using an explicit stack:

• • Avoids system stack limitations, can handle very deep trees.
• • Allows more flexible management of the traversal process.
• • Code is more complex and less intuitive.

The choice depends on the task: recursion is convenient for small trees, while for large and deep trees, an iterative approach with an explicit stack is better.