Description: A token stream is a sequence of tokens generated during the compilation process, used for syntax analysis. In the context of programming, tokens are the smallest units of a program that have meaning. These can include keywords, identifiers, operators, and literals. The token stream is essential in the lexical analysis phase, where the compiler or interpreter takes the source code and breaks it down into these meaningful components. This process allows the system to understand the structure and semantics of the code, facilitating further syntactic and semantic analysis. Proper identification and handling of tokens is crucial for generating efficient and error-free code. Additionally, the token stream allows for optimizing the compilation process, as compilers can apply various optimization techniques based on the structure of the generated tokens. In summary, token stream is a fundamental concept in programming that enables the transformation of source code into a representation that can be understood and executed by a machine.