Negator (logic)

In logic, negator (also: negation operator ) is the junction of the negation or the symbol (sign) for it.

The following symbols are used:

• " " ${\displaystyle \neg }$
• " " ${\displaystyle \sim }$
• "N" ( Polish notation )
• Paint over
• In the programming languages C , C ++ , Java , JavaScript , PHP and Perl :!a
• In the programming languages Algol 60 , BASIC , Pascal , ELAN , Ada , Eiffel , Haskell , Perl :not a