COMPILER DESIGN

Detailed explanation-1: -A language is a regular language if there is a finite automaton that recognizes it. For example, this machine recognizes the language of strings that have an even number of zeroes since any string that has an even number of zeroes will go from the start state to an accepting state.

Detailed explanation-2: -A regular language can be recognized by a finite automata, which is a simple machine model consisting of states, transitions, and an initial and final state. Conversely, every regular language can be expressed using finite automata., corresponding to an even number of 0’s in the string.

Detailed explanation-3: -Alternatively, a regular language can be defined as a language recognized by a finite automaton. The equivalence of regular expressions and finite automata is known as Kleene’s theorem (after American mathematician Stephen Cole Kleene).