Lexical Analysis - NLP - WPS Office.pptx

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1. Lexica l A n a l y s i s

2. Lexical analysis is the process of breaking down a string of characters into smaller units called tokens. It's a fundamental step in natural language processing (NLP) and in compiling computer programs.

3. How it works The lexical analyzer reads the input string of characters It identifies tokens, such as keywords, operators, punctuation, and constants It assigns strings to the tokens It removes any whitespace It generates an error if it finds an invalid token It passes the data to the syntax analyzer

4. Benefits of lexical analysis It makes the source code easier for the computer to understand It reduces the complexity of the source code for parsing It facilitates better error handling by detecting and reporting lexical errors early

5. Drawbacks of lexical analysis It operates based on individual tokens and does not consider the overall context of the code This can sometimes lead to ambiguity or misinterpretation of the code's intended meaning