Sep 13, 2025 · In C programming, a header file is a file that ends with the .h extension and contains features like functions, data types, macros, etc that can be used by any other C …

In this tutorial, you will learn about C header files, how it works in the C language and how you can include them in your C program.

Each of the system header files contains a number of utility functions. These functions are often called library functions. For example, printf () and scanf () functions, needed for performing IO …

In this example, you will learn how to create your own header file and use it to organize code across multiple files. Let's create a simple calculator module with a header file and a source file.

Learn C header files with simple explanations and examples. Understand standard and user-defined header files to write clean, modular C programs.

Among its various features, header files play a crucial role in efficient C programming and software development. Header files are used to reuse code across multiple source files and …

Learn everything about Header Files in C, their types, usage, best practices, and common errors. Improve your C programming skills with this detailed guide.

There are two different sorts of header files in C, i.e., Standard library header files and User-defined header files. In this section, we will discuss both types in greater detail.

Dec 9, 2018 · In this example we will create a custom header file for arithmetic operations. We will declare functions to perform all basic arithmetic operations in header file.

To use those functions, we need to include some files in our program. These files are known as header files, and they contain functions and macros. A header file usually has an extension of …