Explanation of Solution
Lexical analysis and syntax analysis:
Syntax analyzer phase in compilation process is the step in which the “tokens” in the programs are identified and recognize whether they are specified in a valid way. In simple words, tokens are the keywords, identifiers and operators in a
- Lexical analysis: It does the analysis of small language constructs like names and numeric literals.
- Syntax analysis: It does the analysis of large constructs like expressions and program units.
The following three reasons explain why lexical analysis is a separate part from the syntax analyzing process.
Simplicity:
The process of lexical analysis needs relatively less complex techniques than syntax analysis. So, separating low-level details of lexical analysis from syntax analysis make the process of lexical analysis simple, small and clean...

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Chapter 4 Solutions
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