Difference between defining a Function and Procedure and deciding the best one

[frosty]

title says it all, basically when i try to use a procedure and call it, i get an error compared to using that as a function which with the same code but just Procedure changed to Function i get no error

so, whats the difference between Function MyFunc(); and Procedure MyFunc();

and whats the best situations to use procedures in place of functions?

[tk]

Procedure can only perform some action:

Code: (pascal) [Select]

procedure Display(x, y: integer);
begin
  WriteLn(IntToStr(x * y));
end;

// ...
Display(3, 4);
//...


Function is a procedure which may also return a result:

Code: (pascal) [Select]

function Multiply(x, y: integer): integer;
begin
  Result := x * y;
end;

// ...
WriteLn(IntToStr(Multiply(3, 4)));
// ...

Don't ask such basic questions btw, you can find such stuff in every available pascal/delphi tutorial.

[frosty]

tx tk, i wont do it again