COMPUTER SCIENCE
Binary tree traversal example.
This balanced binary tree is a compact example for learning recursive traversal. Each internal node has a left and a right child, and the labels make the visit order easy to record. In preorder, visit the root before its subtrees. In inorder, visit the left subtree, root and right subtree. In postorder, visit both subtrees before the root. A small labelled tree like this helps students check that they understand the difference between the three algorithms before using larger trees.
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CASE ANALYSIS
Scenario
data-structures
Key decisions
- Balanced shape: Give the root two children and each child two leaves.
- Letter labels: Make traversal order easy to read.
- Traversal practice: Use the same tree for preorder, inorder and postorder.
When to reuse this
Use this small tree for introductory traversal exercises.
FAQ
Frequently asked questions
What is preorder traversal?
Visit the root, then the left subtree, then the right subtree.
What is inorder traversal?
Visit the left subtree, then the root, then the right subtree.
What is postorder traversal?
Visit the left subtree, then the right subtree, then the root.
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orgchart-binary-tree-traversal