Binary tree: It is a tree data structure which comes under hierarchical data structure. It is made of nodes that have a left child, right child and a data element. Nodes in a binary tree: The node which is at the top of a binary tree is called “root node”. The element that has children is known as “parent node”. The element that is under an element is known as “children”. The element or the node that has two children is called “leaves” or “external nodes”. In binary tree, each node should have at most two children.

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Chapter 21, Problem 22RQE

Program Plan Intro

Binary tree:

It is a tree data structure which comes under hierarchical data structure.

It is made of nodes that have a left child, right child and a data element.

Nodes in a binary tree:

The node which is at the top of a binary tree is called “root node”.

The element that has children is known as “parent node”.

The element that is under an element is known as “children”.

The element or the node that has two children is called “leaves” or “external nodes”.

In binary tree, each node should have at most two children.

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