**How Many Types of Binary Tree Are There in Data Structure?**

A binary tree is a fundamental data structure in computer science that consists of nodes connected by edges. Each node can have at most two children, referred to as the left child and the right child. Binary trees are widely used in various applications such as searching, sorting, and storing hierarchical data.

## Types of Binary Trees

In data structure, several types of binary trees are defined based on their specific characteristics and properties. Let’s explore some of the commonly known types:

### 1. Full Binary Tree

A full binary tree is a type of binary tree where every node has either zero or two children. In other words, each node in a full binary tree has either both left and right children or no children at all.

### 2. Complete Binary Tree

A complete binary tree is a binary tree in which all levels are completely filled except possibly for the last level, which is filled from left to right. This property makes it efficient for storage purposes.

### 3. Perfect Binary Tree

A perfect binary tree is a type of binary tree where all internal nodes have two children and all leaves are at the same level.

### 4. Balanced Binary Tree

A balanced binary tree is a type of binary tree where the height difference between the left and right subtrees of any node is at most one. It ensures that the height of the tree remains logarithmic with respect to the number of nodes, resulting in efficient operations.

## 5. AVL Tree

An AVL (Adelson-Velskii and Landis) tree is a self-balancing binary search tree with additional balance factors maintained for each node. It guarantees that the height difference between the left and right subtrees of any node is at most one, ensuring efficient operations.

## 6. Red-Black Tree

A red-black tree is another type of self-balancing binary search tree where each node has an extra bit for color (either red or black). It maintains balance by following specific rules during insertion and deletion operations.

## 7. Binary Search Tree

A binary search tree (BST) is a type of binary tree where the left child of a node contains a value smaller than its parent, and the right child contains a value greater than its parent. This property allows efficient searching, insertion, and deletion of elements.

### Conclusion

In conclusion, there are various types of binary trees in data structure, each with its own characteristics and applications. Understanding these types can help in choosing the appropriate data structure for specific requirements and optimizing operations.