Question

What are header files???

Answer 1

Heya!

Header files=============
  Header files are library file, which contains collection of build in functions.
  TO declare header file as :
# include <headerfilename.h>
Important header files :=======================
stdio.h  -> standard INPUT Output functions conio.h  -> console input output related functions math.h   -> mathematical related functions

Answer 2

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Header Files - Header Files contain the definition of all library functions. Any function which is used in program , must have it's corresponding header file. The extension of Header Files is '.h'.

There are 15 header files in C language.