What are Kotlin Coroutines?

Updated Feb 20, 2026

Short answer

Coroutines are lightweight threads used for asynchronous programming in Kotlin.

Deep explanation

🔹 Why Coroutines

Traditional threading:

  • Complex
  • Memory-heavy

Coroutines:

  • Lightweight
  • Structured concurrency

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🔹 Key Concepts

  • suspend functions
  • CoroutineScope
  • Dispatchers (IO, Main, Default)

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🖼️

Markdown
![Coroutines](https://developer.android.com/static/images/kotlin/coroutines-overview.png)

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🔹 System-Level Insight

  • Handles network + DB calls efficiently
  • Prevents UI blocking

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🔹 Performance Insight

  • Uses fewer threads
  • Improves responsiveness

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