Functions Documentation
View Function Edit Function
Name not
Syntax (not exp) -> True/Nil
Argument List exp: The expression you want to negate.
Returns condition: True if the expression evaluates to Nil, otherwise Nil.
Category logical operator
Description Returns the logical negation of the expression.
Example 
(not Nil) -> True
(not True) -> Nil
(not (eq 1 2)) -> True
(not (gr 2 1)) -> Nil
Comment Basic logical function to be used in conditionals.