What are tree traversal algorithms?

What are tree traversal algorithms?

Tree traversal algorithms are methods for visiting all the nodes in a tree data structure. They can be classified mainly into three types: in-order, pre-order, and post-order.

Can you explain the difference between in-order and pre-order traversal?

Sure! In in-order traversal, you visit the left subtree, then the node, and finally the right subtree. In pre-order traversal, you visit the node first, then the left subtree, and finally the right subtree.

When would you use each type of traversal?

In-order traversal is often used to retrieve data in sorted order, while pre-order traversal is useful for creating a copy of the tree or for prefix expression evaluation.

Are there any other traversal methods?

Yes, there's also level-order traversal, which visits nodes level by level, and depth-first traversal, which explores as far as possible along each branch before backtracking.