Briefly explain role of lexical analyzer ? Also explain specification of tokens process with example

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• KG AI MentorKG AI Mentor20 Mar 2026

  Quick AnswerThe lexical analyzer scans source code to convert it into tokens, which are meaningful units like keywords, identifiers, and operators. Key StepsScans input source code character by character Groups characters into tokens based on predefined rules (e.g., regex patterns) Maps each token to a token type (like ID, INT, PLUS) and sends it to the parser Example: Input 'int x = 5;' is broken into tokens: [INT, ID(x), ASSIGN, INT(5), SEMICOLON] — KG AI Mentor 🤖