GoSub...Return Statement

Calls a subroutine that is indicated by a label from a subroutine 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.

Синтакса


see Parameters

Параметри:

Под/функција

statement block

Ознака

statement block

GoSub ознака

Exit Sub/Function

Ознака:

statement block

Врати

End Sub/Function

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 (":").

Warning Icon

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.

Пример


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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