What will happen if a state machine has an internal transition?

In a state machine, an internal transition allows a state to change its behavior without actually transitioning to a different state. This means that when an internal transition occurs, the state remains the same, but the actions defined in the effect of that internal transition are executed.

When the effect behavior is executed, it might involve changing attributes or performing other actions, but since the state itself does not change, the entry behavior of a target state is not triggered, nor does an exit behavior execute because the state remains unchanged. Thus, only the effect behavior of the internal transition is executed during this event.

In this context, understanding the nature of internal transitions is crucial. These transitions are designed for scenarios where a system needs to react to events while remaining in the same conceptual state, which is why the effect behavior is the only part of the transition that is realized in this case.