How Many Types of Trees Are There in Data Structure?


Angela Bailey

In the field of data structures, trees are a fundamental concept. Trees are hierarchical data structures that consist of nodes connected by edges. Each node can have zero or more child nodes, and there is always a single node called the root that has no parent.

Types of Trees

There are various types of trees in data structures, each with its own characteristics and uses. Let’s explore some of the commonly used types:

1. Binary Tree

A binary tree is a type of tree where each node has at most two children: a left child and a right child. The left child is typically smaller than the parent, while the right child is larger. Binary trees are often used in search algorithms and binary heaps.

2. Binary Search Tree (BST)

A binary search tree is a special type of binary tree where the values stored in the left subtree are smaller than the parent node, and the values stored in the right subtree are larger. This property allows for efficient searching, insertion, and deletion operations.

3. AVL Tree

An AVL tree is a self-balancing binary search tree where the heights of the left and right subtrees differ by at most one. This balance ensures that search, insertion, and deletion operations have logarithmic time complexity.

4. Red-Black Tree

A red-black tree is another self-balancing binary search tree that ensures balance using color properties on its nodes. This type of tree guarantees that no path from the root to any leaf node is more than twice as long as any other path.

5. B-Tree

A B-tree is a self-balancing search tree designed to work well on disk storage systems. It is characterized by its ability to store large amounts of data on a single node and maintain balance through splitting and merging operations.

6. Trie

A trie, also known as a prefix tree, is a tree-like data structure used for efficient retrieval of keys that share common prefixes. It is commonly used in applications such as autocomplete and spell checking.

7. Heap

A heap is a complete binary tree that satisfies the heap property. In a max heap, the parent node is always greater than or equal to its children, while in a min heap, the parent node is always smaller than or equal to its children. Heaps are often used for efficient priority queue operations.


Trees are versatile data structures that play a crucial role in various algorithms and applications. Understanding the different types of trees and their properties can greatly enhance your problem-solving skills in the field of data structures.

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