Level Order Traversal Binary Tree
Level Order traversal is a
breath first transversal. The traversal starts at the
root and explores all the nodes at the
same depth prior to moving onto the next
depth level. A
queue is normally needed to capture and keep track of the child nodes encountered bu not yet explored.
A breath-first traversal works well on infinite or cyclical tree, where a
depth first traversal might never return with an answer or get lost in the data structure.
Complexity (using a queue)
|Average Case||Worst Case|
Python for Beginners: Level Order Tree Traversal
Educative: Data Structures and Algorithms
Wikipedia: Breath-First Search
Geeks for Geeks: Level Order Binary Tree Traversal