Kotlin Coroutines

Kotlin coroutines enable asynchronous, non-blocking code through suspend functions and structured concurrency. Coroutines pause execution without blocking threads, allowing efficient handling of I/O operations, data fetching, and concurrent tasks on both Android and server-side applications.

Coroutines are lightweight, suspendable tasks that don't block OS threads, making them cheaper to spawn at scale. Threads are heavier and block, wasting resources during I/O waits. Coroutines with structured concurrency provide safer cancellation and exception handling across Kotlin workflows.

Kotlin coroutines provide structured cancellation through scopes and robust exception propagation via try-catch and handler strategies. Cancellation flows through the hierarchy, ensuring cleanup happens automatically, and exceptions are caught before crashing your application or UI.

Yes. Kotlin Flow builds reactive streams with built-in backpressure handling, and channels enable concurrent message passing. Both integrate with coroutines for streaming data, managing consumer-producer speed mismatches, and transforming data pipelines in responsive applications.

Suspend functions are core to coroutines—they mark points where execution can pause without blocking. Understanding suspend functions is essential for writing async code, composing coroutine workflows, and using builders and Flow operators effectively.

Dispatchers route coroutines to specific thread pools or single threads. Default dispatchers handle I/O and computation; you switch dispatchers to run UI updates on the main thread or offload work to background threads, enabling responsive applications across Android and servers.