The difference is that resuming a coroutine mutates it, so that the next time you resume the same object it starts from wherever the coroutine next yielded. Thi

The difference is that resuming a coroutine mutates it, so that the next time you resume the same object it starts from wherever the coroutine next yielded. This may or may not be the same yield point as the last time, depending on the definition of the coroutine. A continuation is immutable in that way, so it is either an error to invoke it multiple times, or else it will always resume at the same place. Implementing coroutines in terms of continuations would mean capturing a new continuation each time you yield.