Header files fo C?

Some common header files in C programming language are:

1. stdio.h - for standard input and output functions
2. stdlib.h - for standard library functions
3. math.h - for mathematical functions
4. string.h - for string manipulation functions
5. ctype.h - for character handling functions
6. time.h - for date and time functions
7. stdbool.h - for boolean data type and values
8. assert.h - for debugging purposes
9. limits.h - for limits of various data types
10. float.h - for limits of floating-point data types

These are just a few examples of commonly used header files in C programming. There are many more header files available for specific purposes and functionalities.