Header Files in C Programming

Header file is The collection of predefined standard library functions is included in header files.

The preprocessing directive "#include" is used to include header files with the ".h" extension in the program.

SOME FUNCTIONS DEFINED UNDER THE STDIO.H

printf() - This function is used to print the character, string, float, integer, octal and hexadecimal values onto the output screen.

scanf() - This function is used to read a character, string, numeric data from keyboard.

and many more function.

some examples of header files

math.h - mathematical related operations
String.h - string related operation
stdlib.h and many more.

In C programming, header files play a very important role.
They allow programmers to use predefined functions and macros, which saves time and effort.
Instead of rewriting common functions (like input/output operations, string manipulations, or mathematical calculations), we can simply include a header file and directly use the required functions.

Some important points:

• Header files reduce code redundancy.
• They make programs easier to manage and modular.
• Custom header files can also be created by programmers as per their needs using .h extension.

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