How does Kotlin ensure safe concurrency without locks in many cases?

Kotlin avoids many locks by using immutability, structured concurrency, and coroutine suspension.

Kotlin reduces need for explicit locking by encouraging immutable state and coroutine-based concurrency. Since coroutines suspend instead of blocking threads, many race conditions are avoided at design level. When shared state is necessary, atomic operations or Mutex are used instead of heavy synchronization blocks, reducing contention and improving scalability.