COMPILER DESIGN

Detailed explanation-1: -Lexical Analysis: Lexical analysis or Lexical analyzer is the initial stage or phase of the compiler. This phase scans the source code and transforms the input program into a series of a token. A token is basically the arrangement of characters that defines a unit of information in the source code.

Detailed explanation-2: -Explanation: Lexical Analyzer is also called “Linear Phase” or “Linear Analysis” or “Scanning“.

Detailed explanation-3: -In computer science, lexical analysis, lexing or tokenization is the process of converting a sequence of characters (such as in a computer program or web page) into a sequence of lexical tokens (strings with an assigned and thus identified meaning).

Detailed explanation-4: -The input to a lexical analyzer is the pure high-level code from the preprocessor. It identifies valid lexemes from the program and returns tokens to the syntax analyzer, one after the other, corresponding to the getNextToken command from the syntax analyzer.