11. Changing the function names is not a problem. 12. In the case of cdecl, the function name is merely prefixed by an underscore. 13. You can also define new function names using \ operatorname { . . . }. 14. Function names end with a period.15. Function names are usually selected so as to be descriptive of the function's purpose.16. He is mostly recognized for the Matsumoto zeta function, a zeta function named after him. 17. The function split is implemented with a local function named loop, which has two additional parameters. 18. The built-in function name ( ) returns an ASCII string for the current enumerated value. 19. This information includes the possibility to lookup source file / line number locations, and function names . 20. This would allow the user to enter comments, and non-generic variable and function names .