Question

Difference between lexical analysis and parsing in compiler design by

Answer 1

Answer:

The main difference between lexical analysis and syntax analysis is that lexical analysis reads the source code one character at a time and converts it into meaningful lexemes (tokens) whereas syntax analysis takes those tokens and produce a parse tree as an output.

Answer 2

Answer:

• Lexical analysis reads the source program one character at a time and converts it into meaningful lexemes (tokens), while parsing takes tokens as input and generates a syntax tree as output. So this is the main difference between lexical analysis and syntactic analysis.
• Lexical analysis is the process of converting a sequence of characters into a sequence of tokens, while syntactic analysis is the process of analyzing a string of symbols
• Also, another difference between lexical analysis and syntax analysis is that lexical analysis is the first stage of the compilation process while syntax analysis is the second stage of the compilation process.
• In short, a compiler is a software program that converts source code into equivalent machine code. In addition, it goes through several stages to accomplish this task. Two of them are lexical analysis and syntactic analysis. In general, syntactic analysis occurs after lexical analysis. The main difference between lexical parsing and parsing is that lexical parsing reads the source code one character at a time and converts it into meaningful lexemes (tokens), whereas parsing takes these tokens and produces a parsing tree as output.

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