returntype name ( parameters )
statementblock
if there is no returntype or parameters, 'void' is used instead.
User-defined functions are functions that are not provided by the language itself. They are the functions that you yourself write or that are provided for you by a third-party.
user defined exception is created by user such as arthmetic,number format exception ...
to create user defined functions the user defined data is needed nd its useful to the programmer to create its own data.
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.
Editor and debugger.
What is the difference between predefined function and user defined functions
Predefined functions are functions that have been written and we can use them in our C++ statements. But we must know how to use each of these predefined functions.
Built-in functions are functions that are provided for you by the standard includes. User-defined functions are those that you write yourself. Third-party functions are those that are written for you, but that are not provided by the standard includes.
It is a software or program designed to allow a user to perform a veriety of coordinated user defined functions
No. There are no built-in functions in C, there are only built-in types and built-in operators for those types. All functions are user-defined, including those defined by the C standard library. There are no user-defined operators in C, but you can implement operators as named functions if required. A header file (*.h file) typically contains a group of related user-defined function and/or user-defined type declarations which can be included in any source file that requires them. Every user-defined function or user-defined type name used by a program must have one (and only one) definition, usually contained in a corresponding source file (*.c file) or library file (*.lib file). Built-in types and their corresponding operators do not require a header file since they are part of the language itself (hence they are built-in).
To perform Specific Tasks Using Mathematical, Logical and some other specail inbuilt functions and user defined functions.
There are two types of functions in C++: Built-in or standard Library Function User defined function BUILT-IN FUNTION Built-in function which are also called Standard Library Functions are the functions provided by the C++ and we do not have to write them. These functions are included in the Header Files They are mostly written at the start of the Program They cannot be changed. EXAMPLE: conio.h; clrscrn; , etc. USER-DEFINED FUNCTION A user-defined function is a function defined by the programmer. It allows the programmer to write their own function. It allows the programmer to divide the program in many parts, which makes it easy for the programmer to rectify or modify the program; as it is easy to locate & jump to any part of the program. A programmer can write groups code to perform a specific task and that group of code is given a name (identifier).