What is a state change diagram?

A state change diagram, often referred to as a state diagram or state machine diagram, is a visual representation that illustrates the various states an object or system can occupy and the transitions between those states. It typically includes states, events that trigger transitions, and actions that occur as a result of those transitions. This type of diagram is commonly used in software engineering and systems design to model the behavior of dynamic systems. By clearly outlining the states and transitions, it helps in understanding system behavior and facilitates better design and implementation.