Description: Lexical analysis is the preparation of a process of reading words from the input source program to identify each word has an independent significance, that is the basic retention of the word, identifiers, constants, operators, delimiters five categories. And followed by all the output of the internal code word and the word itself the value of symbols. Programming language the word symbols are generally divided into five: keywords (reserved words/basic word) if, while, begin ... identifier: constant name, variable name ... constants: 34,56.78, true, a, ... Operator: 2B !,-,*,/,<, and, or, ...., boundaries Fu:, () ()/* ....
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