function in c++ definitions types example

 Structure of a Function

A function in C++ consists of two main parts:

Function Declaration: This informs the compiler about the function's existence, including its name, return type, and parameter list (if any).

Function Definition: This provides the actual code that the function executes when it's called. It contains the statements that perform the desired task.

Types of Functions in C++

User-Defined Functions: These are functions created by the programmer to address specific needs within the program.

Library Functions: These are predefined functions provided by the C++ standard library and offer a wide range of functionalities.

Example of a User-Defined Function:

C++

int add(int a, int b) {

  int sum = a + b;

  return sum;

}

This function takes two integer parameters, a and b, adds them, and returns the result.

Example of a Library Function:

C++

#include <iostream>

int main() {

  std::cout << "Hello, World!" << std::endl;

  return 0;

}

This program uses the std::cout library function to print the message "Hello, World!" to the console.

Short Definitions:

Function Name: The identifier that uniquely identifies the function.

Return Type: The data type of the value returned by the function (void indicates no return value).

Parameters: Optional input values passed to the function.

Function Body: The code that is executed when the function is called.

more about👇

keywords.

function in c,

c functions,

functions tutorial in c,

c functions tutorial,

c programming,

advantages of functions in c,

functions,c programming functions,

use functions in c,

function program in c,

what is array in c,

function in c programming,

categories of function in c,

function prototype in c,

what is pointer in c

thanks