C# || How To Traverse A Binary Tree Preorder Using C#

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The following is a module with functions which demonstrates how to traverse a binary tree pre order using C#.


1. Binary Tree Traversal – Problem Statement

Given the root of a binary tree, return the preorder traversal of its nodes’ values.

Example 1:

Example 1


Input: root = [1,null,2,3]
Output: [1,2,3]

Example 2:


Input: root = []
Output: []

Example 3:


Input: root = [1]
Output: [1]

Example 4:

Example 4


Input: root = [1,2]
Output: [1,2]

Example 5:

Example 5


Input: root = [1,null,2]
Output: [1,2]


2. Binary Tree Traversal – Solution

The following is a solution which demonstrates how to traverse a binary tree pre order.

QUICK NOTES:
The highlighted lines are sections of interest to look out for.

The code is heavily commented, so no further insight is necessary. If you have any questions, feel free to leave a comment below.

Once compiled, you should get this as your output for the example cases:


[1,2,3]
[]
[1]
[1,2]
[1,2]

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