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What does "concurrency" mean in programming?
concurrency is one of the most common terms in software development. This guide explains what it means, how it is used in practice, and why it matters, with real examples from the developer world.
Definition
The ability to handle multiple tasks that overlap in time. Concurrent tasks may interleave on a single CPU (unlike parallelism, which requires simultaneous execution on multiple CPUs). Node.js handles concurrency via an event loop; languages like Go use goroutines.
Example
"Node.js handles concurrency with an event loop — thousands of requests are in progress at once without blocking threads."
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