header files

Header files in programming are like blueprints or instruction sheets shared among different parts of a program. They contain declarations of functions, variables, and data structures that can be used across multiple files. Including a header file allows different program components to access common code without rewriting it, ensuring consistency and saving time. Think of them as reference guides that help organize and modularize code, making complex software easier to develop, maintain, and understand. They do not contain actual executable code but specify what functions or data are available to other parts of the program.