Not - MACROMEDIA FLASH MX 2004-ACTIONSCRIPT LANGUAGE Reference

not

Availability
Flash Player 4. This operator was deprecated in favor of the
Usage
not expression
Parameters
A variable or other expression that converts to a Boolean value.
expression
Description
Operator; performs a logical NOT (!) operation in Flash Player 4.
See also
! (logical NOT)
1094 Appendix: Deprecated Language Elements
operator.
! (logical NOT)