A binary tree is a tree data structure which each node has at most two children. The children are referred to as the left child and the right child. The top most node in the tree is referred to as the root node. A tree is a collections of node(s). Nodes are connected by edges. Each node contains a value and it may or may not have a child node.

A binary tree is a tree data structure which each node has at most two children. The children are referred to as the left child and the right child. The top most node in the tree is referred to as the root node.

A tree is a collections of node(s). Nodes are connected by edges. Each node contains a value and it may or may not have a child node.

Traversing a tree is the process of visiting each node in the tree exactly once. There are 2 widely known techniques for traversing trees are:

- DFS or Depth First Search
- BFS or Breadth First Search — Level Order Traversal

We will focus on DFS (Depth First search) techniques. These algorithms can be generalized and applied to other types of trees beyond binary trees.

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This article will introduce the concepts and topics common to all programming languages, that beginners and experts must know!