NO
Yes, they are organised into categories in the functions Library group, which is on the ribbon's Formulas tab.
library catalogue functions
You don't have to know. Library functions are also written by somebody, aren't they?
The main function in C is user-defined. Built-in functions are simply those that do not require a library to be included, but every program must provide a user-defined point of entry; it cannot be built-in. Indeed, most functions in C are user-defined; the built-in functions are mostly operators rather than functions although most do behave like functions. The standard library functions are not built-in either; they all require the inclusion of the appropriate standard library header.
String library function is one which is used to perform an operation in C-programming,without which library functions likestrlen(),strcp(),strcmp(),strdup(),strrev(),etc..,.can be performed
I guess you mean predefined functions or library functions. Well, you don't have to use them, but they can be useful.
If you have written it yourself, then it is the former, otherwise it is the latter.
This are the predefined functions in c, which are already write.Examples : printf(),scanf().
The web is not organized as well as a library.
the functions of a library are simple: 1) to supply information 2) they entertain people (books are fun) 3) help people
Is the FORTRAN function part of a library. If it is it will be no different from call a c function in a library. There could be an issue the order that the functions attribures are pusshed onto the stack like there is with pascal.
There are 2 types of library functions.One system defined & another user defined.In system defined functions we can not determine whether a library function is recursive or not.It may or may not be recursive.But in user defined library functions for example factorial() can be made recursive.No matters whether it is a library function.So if you understand recursion properly then this question makes no sense.