Functions Intro

A function is a sequence of statements collected under a single name (the function's name). A simple example of a function declaration is: 
void aFunction()
{
    cout << "First function statement" << endl;
    cout << "Second function statement" << endl;
}
aFunction() is the function's name. The function's name can be used to call the function: i.e. to get the function's body executed.

Example


#include <iostream>
using namespace std;

void aFunction() // function definition
{   // start of the function's implementation
    cout << "First function statement" << endl;
    cout << "Second function statement" << endl;
}   // end of the function's implementation

int main()
{
    aFunction(); // function call
    aFunction(); // another function call
}

Output

First function statement
Second function statement
First function statement
Second function statement