A header file is a record with extension .h which contains C function statements and macro definitions to be shared between a few source files. C preprocessing directive #include, similar to you, have seen the consideration of stdio.h header file, which comes along with your compiler.
The file contains the definitions and models of the functions being utilized in the program are known as a header file. It is otherwise called a library file.
A header file is commonly used to characterize the majority of the functions, variables, and constants contained in any function library that you should need to utilize. The header document stdio.h ought to be utilized in the event that you need to utilize the two norms I/O functions printf and scanf.
Example: The header file contains directions like printf and scanf is the stdio.h
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Nitesh Bavishiya