Problem Statement
What does the suspend modifier on a function mean?
Explanation
The suspend keyword marks functions that can suspend execution without blocking the thread, allowing them to be paused and resumed later. Suspend functions can only be called from other suspend functions or from coroutine builders like launch or async, not from regular functions.
When a suspend function calls another suspend function, it can suspend at that point, releasing the thread for other work until the called function completes. This happens automatically without any thread management code from the developer.
Suspend functions are the building blocks of coroutine-based async code, and despite looking like regular sequential code, they compile to efficient state machine implementations that handle suspension and resumption under the hood.
