1. Introduction
Finite state machine (English: finite-state machine, abbreviation : FSM ), also known as finite-state automata , or state machine for short , is a mathematical model that represents a finite number of states and the transitions and actions between these states . It is a tool used to model the behavior of an object. Its function is mainly to describe the sequence of states the object experiences during its life cycle and how to respond to various events from the outside world
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