Abstract
Lexical analysis helps the interactivity and visualization for active learning that can improve difficult concepts in automata. This study gives a view on different lexical analyzer generators that has been implemented for different purposes in finite automata. It also intends to give a general idea on the lexical analyzer process, which will cover the automata model that is used in the various reviews. Some concepts that will be described are finite automata model, regular expression and other related components. Also, the advantages and disadvantages of lexical analyzer will be discussed.Â
Highlights
Lexical analysis is the procedure used in changing a series of characters into a series of tokens
A lexer sometimes exists as one function which is called by another function or a parser. it can be joint with the parser in scanner less parsing Lexical analyser is broadly used in variety of software such as compiler for programming language
A) Strings are accepted as tokens; b) Questions on-line are given to the users; if the user answers \yes’’ the string is accepted and if the user answers \no “it is rejected; c) If the fourth part is not given, the string is rejected, the following rules are assumed by default: 7): This research described the utility and design of a Java Finite Automata Simulation Tool.jFAST is an instructional software package used as an easy learning and easy-to-use software tool for teachers and students in order to determine and see the insights of a finite state machines
Summary
Lexical analysis is the procedure used in changing a series of characters into a series of tokens. A program that operates lexical analysis is called lexer, scanner, a lexical analyser, or tokenizer. A lexer sometimes exists as one function which is called by another function or a parser. It can be joint with the parser in scanner less parsing Lexical analyser is broadly used in variety of software such as compiler for programming language. The first phase of a compiler is the Lexical analysis. Its function is to turn a raw character or byte input stream coming from the source file into a token stream by dividing the input into pieces and discarding irrelevant details
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