Binary Search Tree Traversal (in-order, pre-order and post-order) in Go

Binary Search Tree Traversal (in-order, pre-order and post-order) in Go

A binary tree is a data structure where every node has at most two child nodes. Below is a sample binary tree. The top most node is the…

A binary tree is a data structure where every node has at most two child nodes. Below is a sample binary tree. The top most node is the root node.

All nodes at the bottom that do not have any child nodes attached are known as leaf nodes.

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A simple binary tree

If a binary tree is of height h, then there can be maximum 2⁽ ʰ⁺ ¹⁾-1 nodes. Let n be the number of nodes. Then :

=> n = 2⁽ ʰ⁺ ¹⁾-1

=> n + 1 = 2⁽ ʰ⁺ ¹⁾

=> log₂(n+1) = log₂(2⁽ ʰ⁺ ¹⁾)

=> log₂(n+1)(h+1)log₂2

=> log₂(n+1) -1 = h or h = log₂(n+1) -1

So given n nodes the optimal height h of a tree is log₂(n+1) -1

The root node is at level 0. At every level there can be maximum  nodes, where _l _is the level.

Enough of mathematics! Now let me explain binary search tree. A binary search tree is a special data structure where data in left child is less than its parent node and right child is greater than its parent. Below is an example of a binary search tree:

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