2.1.2 Boolean Operations

These are the Boolean operations, ordered by ascending priority:  

Operation	Result	Notes
x or y	if x is false, then y, else x	(1)
x and y	if x is false, then x, else y	(1)
not x	if x is false, then 1, else 0	(2)

   

Notes:

(1)

These only evaluate their second argument if needed for their outcome.

(2)

"not" has a lower priority than non-Boolean operators, so e.g. not a == b is interpreted as not(a == b), and a == not b is a syntax error.