Computer Science / Unit 3 CS 0106 short lesson, about 20 seconds
The Tree
Captions available
The idea
A tree is a hierarchical data structure of nodes descending from a root through parent-child links to childless leaves, the hierarchy's depth called its height.
In practice
A school's organization chart hangs every role beneath one head and bottoms out at classrooms.
Where people slip
One parent per node — that constraint makes it a tree.
Your place on the trail
Every lesson rests on earlier ones and opens later ones. Tap any to jump.
Builds on
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