A token is the smallest unit in a programming language that possesses some meaning (such as +, -, *, “function”, or “new” in JavaScript). Lexical Analysis: A lexical analyzer is used to produce tokens from a stream of input string characters, which are broken into small components to form meaningful expressions. The overall process of parsing involves three stages: To do so, it follows a set of defined rules called “grammar”. The parser is commonly used as a component of the translator that organizes linear text in a structure that can be easily manipulated (parse tree). ![]() This task is usually performed by a translator (interpreter or compiler). In order for the code written in human-readable form to be understood by a machine, it must be converted into machine language.
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