Looking for a clear definition of what a “tokenizer”, “parser” and “lexers” are and how they are related to each other and used?

Question

I am looking for a clear definition of what a \"tokenizer\", \"parser\" and \"lexer\" are and how they are related to each other (e.g., does a parser use a tokenizer or vice

Answer 1

(adding to the given answers)

• Tokenizer will also remove any comments, and only return tokens to the Lexer.
• Lexer will also define scopes for those tokens (variables/functions)
• Parser then will build the code/program structure