string logic

+++String logic+++
~~in PTC~~
-Values-
any string: illegal
-Operators-
              ! : illegal
        == , != : allowed
> , < , <= , >= : illegal
        && , || : N/A
~~In SB~~
-Values-
any string: truthy
-Operators-
              ! : illegal
        == , != : allowed
> , < , <= , >= : allowed
        && , || : allowed
+++EOF+++