Flow-control structures: Difference between revisions

=== Return / Exit Sub ===

This shows the classical and modern syntax for exiting a sub routine early.

Sub Foo1()

If Not WorkNeeded() Then Exit Sub

DoWork()

End Sub

Sub Foo2()

If Not WorkNeeded() Then Return

DoWork()

End Sub

=== Return value / Exit Function ===

This shows the classical and modern syntax for exiting a function early. There is an implied variable with the same name as the function. This variable is write-only.

Function Foo3()

Foo3 = CalculateValue()

If Not MoreWorkNeeded() Then Exit Function

Foo3 = CalculateAnotherValue()

End Function

Function Foo4()

Dim result = CalculateValue()

If Not MoreWorkNeeded() Then Return result

Return CalculateAnotherValue()

End Function