Custom Routines (Cross Ref > Language Basics)

Delphi is a hybrid language so you can create either class methods (functions and procedures) or you can create global functions and procedures. When a function or procedure is part of a class, it is a class method.

[function/procedure] RoutineName : ReturnType;

As with C++, your custom routine must come before it's first usage or you have to prototype it in the Interface section.

Note: Contrast Delphi with Delphi Prism which is an OOP language (everything is within a class). Both Delphi and Delphi Prism are based on Object Pascal but implement OOP features differently and have some syntax differences too.

procedure SayHello(pName: String);
begin
  ShowMessage('Hello ' + pName);
end;

function Add(p1, p2 : Double): Double;
begin
  Result := p1 + p2;
end;

 Delphi Custom Routines (procedure, function)

C++ is a hybrid language and as such offers global functions and class methods. A function must come before it's usage or you can prototype the function.

void sayHello(string pName) {
  cout << "Hello " + pName + "\n";
};

int add(int p1, int p2) {
  int result;

  result = p1 + p2;
  return result;
};

 C++ Custom Routines