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.

Syntax:

see Parameters

Parameters:

Sub/Function

statement block

Label

statement block

GoSub Label

Exit Sub/Function

Label:

statement block

Return

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 (":").

If the program encounters a Return statement not preceded by GoSub, Collabora Office 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