Enqueue
Domain: Data Structures
🎯 Motivation
Enqueue is the operation of adding an item to the back of a queue.
📋 Concrete Example
q.append('task3') adds task3 to the end of the queue. It will be processed after all earlier items.
🔗 Analogy
A new person joining the back of the lunch queue. They stand at the end and wait their turn.