Write ac program to implement binary tree traversals

In the linear data structure e. Arrays, Linked list etc , we have only one logical way to traverse through them. We start from the beginning and move through each element. Binary tree is non-linear data structure, and it provides few different options for traversal. On a high level, we have the following 2 options for binary tree traversal in Java.

The depth-first search DFS is a tree traversal technique. Here is how the depth-first search will traverse the tree starting from root node. If you look at the above picture, we are doing picking the one side of the tree and traversing it before going to the next side of the tree. There are few advantages of the depth-first search traversal.

In the in-order binary tree traversal, we visit the left sub tree than current node and finally the right sub tree. Here is the high-level algorithm for BST in-order traversal. The In order binary tree traversal will give the output in the ascending order.

Therefore, we also call it in-order tree traversal. The pre-order binary tree traversal involve visit the current node followed by left sub-tree and finally the right sub-tree.

Here is a high-level algorithm for preorder BST traversal. Related Articles. Table of Contents. Improve Article. Save Article. Like Article. Python program to for tree traversals. A class that represents an individual node in a. A function to do inorder tree traversal. First recur on left child. A function to do postorder tree traversal.

A function to do preorder tree traversal. First print the data of node. Then recur on left child. Finally recur on right child.

Node left, right;. Node root;. Write node. WriteLine "Preorder traversal ". Next Inorder Tree Traversal without Recursion. Recommended Articles. Check if given inorder and preorder traversals are valid for any Binary Tree without building the tree. Check if a binary tree is subtree of another binary tree using preorder traversal : Iterative.