Inorder Traversal Of A Binary Tree

A Quick Overview

A tree can be traversed in various ways, unlike linear data structures (Stacks, Linked Lists, Arrays, Queues, etc.) where there is only one logical way to traverse them.

Introduction to Inorder Traversal

It’s a technique of traversing over all nodes of tree. During in-order traversal of a binary tree, we traverse whole left subtree, then current node, and then the right subtree.

1. Traverse left subtree, i.e., call Inorder(left->subtree)  2. Visit the root.  3. Traverse right subtree, i.e., call Inorder(right->subtree)

Recursive Approach

Time complexity: O(N), where N is no of nodes in tree.  Space complexity: O(1)

Iterative Approach

This method traverses the trees iteratively. This requires stack data structures.

Time complexity: O(N), where N is no of nodes in tree  Space complexity: O(N)

How to implement these approaches in different programming languages?