Built-In ALisp Operators

Boolean Operators

Operator	Function
not	returns the boolean opposite of its one argument
!	Alias for not
equal?	returns wether or not its arguments are all equal
=	alias for equal?
!=	equal of applying the not operator to equal?
>	returns whether its arguments are in strictly descending order
>=	returns whether its arguments are in descending order
<	returns whether its arguments are in strictly ascending order
⇐	returns whether its arguments are in ascending order
and	returns whether all of its arguments are true
or	returns whether any one of its arguments is true
xor	returns whether exactly one of its arguments is true

The values #f and () are both false, while all other ALisp objects are true.

The operators and, or, and xor only evaluate enough arguments (from left to right) to determine their result.