GoSub...Return Statement

Calls a subroutine that is indicated by a label inside a Sub or a Function. The statements following the label are executed until the next Return statement. Afterwards, the program continues with the statement that follows the GoSub statement.

GoSub label[:]

label: A line identifier indicating where to continue execution. The scope of a label in that of the routine it belongs to.

The GoSub statement calls a local subroutine indicated by a label from within a subroutine or a function. The name of the label must end with a colon (":").

  Sub/Function foo
      ' statements
      GoSub label
      ' statements
      Exit Sub/Function
  label:
      ' statements
      Return
  End Sub/Function

Si'l programa atopa una instrucción Return que nun va precedida de GoSub, LibreOffice Basic devuelve un mensaxe de fallu. Use Exit Sub o Exit Function p'asegurase de que'l programa sala d'una Sub o Function enantes de llegar a la siguiente instrucción Return.

L'exemplu siguiente demuestra l'usu de GoSub y Return. Al executar una seición de programa dos vegaes, ésti calcula'l raigañu cuadráu de dos númberos qu'introdució l'usuariu.

Sub ExampleGoSub
Dim iInputa As Single
Dim iInputb As Single
Dim iInputc As Single
    iInputa = Int(InputBox("Escriba'l primer númberu: ","EntradaNúmberu"))
    iInputb = Int(InputBox("Escriba'l segundu númberu: ","EntradaNúmberu"))
    iInputc=iInputa
    GoSub SquareRoot
    Print "La raíz cuadrada de";iInputa;" ye";iInputc
    iInputc=iInputb
    GoSub SquareRoot
    Print "La raíz cuadrada de";iInputb;" ye";iInputc
    Exit Sub
SquareRoot:
    iInputc=sqr(iInputc)
    Return
End Sub