Introduction to Queues
Explore the fundamentals of queue data structures, understand FIFO principles, and learn how to perform key operations such as enqueue, dequeue, and peek. Discover practical uses of queues in task scheduling, buffers, breadth-first search, and more, all within the C# context.
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Long before queues were formalized as a data structure, programmers needed a way to manage a growing list of tasks that must be processed in the order they arrive. Early computers handled jobs from multiple users concurrently, and without a defined ordering mechanism, task scheduling was neither fair nor predictable. The queue data structure was introduced to enforce this ordering.
What is a queue?
A queue is a linear data structure that follows the first in, first out (FIFO) principle. This means the first element added to the queue is the first one to be removed.
A queue is similar to a line of people waiting for service. The first person in line is served first. New entries are added at the back, and removals happen from the front.
