What is the purpose of state diagram?

A state diagram visually represents the states of a system and the transitions between those states in response to events or conditions. It helps in understanding the dynamic behavior of a system by illustrating how it responds to inputs over time. State diagrams are commonly used in software engineering, systems design, and modeling to clarify system functionality and to facilitate communication among stakeholders. They provide a clear framework for analyzing and designing system behavior, making it easier to identify potential issues and ensure logical flow.