1. Lecture 36 Section 12.2 Mon, Apr 23, 2007
Binary Trees
Lecture 36
Section 12.2
Mon, Apr 23, 2007
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Binary Trees

2. Binary Trees
A binary tree is a data structure with the following properties.
It is either empty or it has a root node.
Each node in the binary tree may have up to two children (called left and right).
Each node, except the root node, has exactly one parent. The root node has no parent.
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3. A Binary Tree 10 20 30 40 50 60 70
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4. Terminology The tree metaphor The family metaphor
tree, root, branch, leaf.
The family metaphor
parent, child, sibling, ancestor, descendant.
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5. Tree Terminology 10 20 30 40 50 60 70
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6. Tree Terminology
Root 10 20 30 40 50 60 70
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7. Tree Terminology 10 20 30 40 50 60 70
Parent
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8. Tree Terminology 10 20 30 40 50 60 70
Leaves
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9. Tree Terminology 10 20 30 40 50 60 70 Right Child 2/17/2019
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10. Tree Terminology
Subtree 10 20 30 40 50 60 70
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