When it comes to storing data in a hierarchical manner, trees are an excellent choice. But have you ever wondered which data structure is used by trees? In this article, we will explore the inner workings of trees and the data structure that powers them.

## Introduction to Trees

Trees are a widely used data structure in computer science. They provide an efficient way to organize and store data in a hierarchical manner. A tree consists of nodes connected by edges, where each node can have zero or more children.

### The Node Structure

At the heart of the tree is the node structure. Each node in a tree contains two main components:

**Data:**This is the actual information that you want to store in the tree. It can be anything from numbers to strings or even complex objects.**Pointers:**These are references to other nodes in the tree, specifically its children. Pointers allow nodes to be linked together, forming the hierarchical structure of the tree.

### The Tree Data Structure

Now that we understand what nodes are made of, let’s dive into the data structure itself. The most common data structure used by trees is called a linked list.

A linked list is a collection of nodes where each node contains both data and a pointer to the next node in the list. In the context of trees, each node represents an element, while the pointer refers to its child nodes.

The use of linked lists as a data structure for trees provides several advantages. Firstly, it allows for efficient insertion and deletion operations since adding or removing elements only requires updating pointers between nodes rather than physically moving elements around.

Additionally, linked lists enable easy traversal of the tree. Starting from the root node, you can follow the pointers to navigate through the tree and access each element in a systematic manner.

### Binary Trees

One commonly used type of tree is the binary tree. As the name suggests, a binary tree is a tree in which each node can have at most two children. This means that each node has two pointers, commonly referred to as the left child and right child pointers.

The use of binary trees brings further advantages in terms of efficiency and ease of implementation. It allows for easy searching, sorting, and other operations on the data stored in the tree.

## Conclusion

In conclusion, trees are a powerful data structure for organizing hierarchical data. The underlying data structure used by trees is typically a linked list, which provides efficient storage and traversal capabilities.

Understanding the data structure used by trees is crucial for building efficient algorithms and solving complex problems. So next time you encounter a tree-like structure, remember that it’s likely powered by a linked list!