function fibit(n: Integer): Integer; var a, b, i, temp: Integer; begin temp := 1;
a := 1;
b := 1; for i := 1 to n - 1 do
begin temp := a + b;
a := b;
b := temp; end;
Result := temp; end;
function fibrec(n: Integer): Integer; var temp: Integer; begin temp := 0; if (n = 0) then temp := 1; if (n = 1) then temp := 1; if (n > 1) then temp := fibrec(n - 1) + fibrec(n - 2);
Result := temp; end;
// Example: procedure TForm1.Button1Click(Sender: TObject); begin ShowMessage(IntToStr(fibit(10)));
ShowMessage(IntToStr(fibrec(10))); end;