Automata Theory Questions
In automata theory, a decidable language refers to a language for which there exists a Turing machine that can determine whether a given input string belongs to the language or not. In other words, there is an algorithm that can always provide a correct answer within a finite amount of time.
On the other hand, an undecidable language is a language for which there does not exist a Turing machine that can determine whether a given input string belongs to the language or not. In other words, there is no algorithm that can always provide a correct answer within a finite amount of time.
In summary, the main difference between a decidable and undecidable language lies in the existence of an algorithm that can determine membership in the language.