Node
Domain: Data Structures
🎯 Motivation
A node is the basic building block of linked lists, trees, and graphs — it holds data and links to other nodes.
📋 Concrete Example
A linked list node: {data: 42, next: pointer_to_next}. A tree node: {data: 42, left: ..., right: ...}.
🔗 Analogy
A person in a phone tree. They hold their own information (data) and have the phone numbers of specific other people (pointers) to call next.