Binary Tree Level Order Traversal

Med
Code
Loading editor...
Tap Analyze to see visualization
Variables

Run code to see variables

Output

Console output will appear here

Press Space to start•← → to step•? all shortcuts

Solution Guide: Binary Tree Level Order Traversal

Approach

Use a queue to process one tree level at a time, enqueuing children as you go.

Complexity Analysis

Time
O(n) where n is node count
Space
O(w) where w is max width

Pattern

BFS Tree Traversal

Why It Works

Queue naturally keeps nodes in arrival order, so level boundaries are processed in order.

Updated Mar 2026