Question

Difference between scanning and parsing in compiler contruction

Answer 1

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Answer :

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- Scanning :

Turning source code into a token stream. This stage removes white space and comments, and identifies what kind of token each piece of the code is.

- Parsing :

Turning a token stream into a parse tree. This stage checks that the sequence of tokens is grammatically correct and can be grouped together according to the specifications of how the language works.