To Nest or Not to Nest Else

[SMcNeill]

Nope.  Think about it a little deeper.

IF x < 300 THEN
   'Do nothing, but we could if we wanted too...
ELSEIF x > 400 THEN  <-- we'll skip this and all other ELSEIF and ELSE statements, if the first condition was true.

Doh! ... brain .. hurts ... ow

See if this little snippet doesn't help clear up any confusion of how it actually works.

Code: (Select All)

Screen _NewImage(640, 480, 32)

$Color:32

Do

    Cls

    Line (100, 100)-(500, 400), Red, BF

    While _MouseInput: Wend

    x = _MouseX: y = _MouseY



    If x < 100 Then

        Print "LEFT OF THE BOX!"

    ElseIf x > 500 Then

        Print "RIGHT OF THE BOX!"

    ElseIf y < 100 Then

        Print "ABOVE THE BOX!"

    ElseIf y > 400 Then

        Print "BELOW THE BOX!"

    Else

        _PrintString (250, 250), "IN THE BOX!"

    End If



    _Limit 30

    _Display

Loop Until _MouseButton(1)

As you can see, running this, it only prints one single condition -- the first one it comes to. Doesn't matter if you're both above and left of the box. It'll print the first exclusion and then skip the rest. It's still a routine which only processes until it finds a condition which isn't true any more. It's just... backwards from how most folks would normally do it.