Functions: Functions

Functions: Functions

Applies To: C++Builder 1 or higher
Category: C++ Language

A function is a section of the C++ program that performs a specific task and that can return a value. Its general form is:

return_type function_name(parameters)
{

}

When the function named function_name is called, all the lines between { and } are executed. Then the function can optionally return back information of the data type specified by return_type. parameters contains a list of variables which will be used as arguments passed to the given function.

For example:

int calculate(int x, int y)

{

}

To return a value, use the return keyword:

int calculate(int x, int y)

{

// ...

return 43;

}

If the function does not return a value or if there are no parameters, use the keyword void:

void calculate(void)

{

}