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

Branches to one of several specified lines in the program code, depending on the value of a numeric expression.

Notkun:

On N GoSub Label1[, Label2[, Label3[,...]]]

On NumExpression GoTo Label1[, Label2[, Label3[,...]]]

Viðföng:

NumExpression: Any numeric expression between 0 and 255 that determines which of the lines the program branches to. If NumExpression is 0, the statement is not executed. If NumExpression is greater than 0, the program jumps to the label that has a position number that corresponds to the expression (1 = First label; 2 = Second label)

Label: Target line according to GoTo or GoSub structure.

Táknmynd fyrir athugasemd

The GoTo or GoSub conventions are valid.


Dæmi:

Sub ExampleOnGosub

Dim iVar As Integer

Dim sVar As String

    iVar = 2

    sVar =""

    On iVar GoSub Sub1, Sub2

    On iVar GoTo Line1, Line2

    Exit Sub

Sub1:

    sVar =sVar & " From Sub 1 to" : Return

Sub2:

    sVar =sVar & " From Sub 2 to" : Return

Line1:

    sVar =sVar & " Label 1" : GoTo Ende

Line2:

    sVar =sVar & " Label 2"

Ende:

    MsgBox sVar,0,"On...GoSub"

End Sub