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# 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.

### Syntax:

    GoSub label[:]

### Parameters:

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

If the program encounters a Return statement not preceded by GoSub, LibreOffice Basic returns an error message. Use Exit Sub or Exit Function to ensure that the program leaves a Sub or Function before reaching the next Return statement.

The following example demonstrates the use of GoSub and Return. By executing a program section twice, the program calculates the square root of two numbers that are entered by the user.

### Example:

    Sub ExampleGoSub
    Dim iInputa As Single
    Dim iInputb As Single
    Dim iInputc As Single
        iInputa = Int(InputBox("Enter the first number: ","NumberInput"))
        iInputb = Int(InputBox("Enter the second number: ","NumberInput"))
        iInputc=iInputa
        GoSub SquareRoot
        Print "The square root of";iInputa;" is";iInputc
        iInputc=iInputb
        GoSub SquareRoot
        Print "The square root of";iInputb;" is";iInputc
        Exit Sub
    SquareRoot:
        iInputc=sqr(iInputc)
        Return
    End Sub

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GoTo Statement

On...GoSub Statement; On...GoTo Statement