Arguments

exprA  any Lisp value or expression

exprB  any Lisp value or expression
:

Return

T if any provided argument evaluates as non-NIL; if all provided arguments evaluate as NIL, or if no argument is provided, NIL is returned

Example

(or 123 nil)  T
(or nil nil 123)  T
(or nil nil)  NIL

Remarks

the (or) function uses "lazy evaluation" - evaluation is stopped for the first non-NIL item (from left to right), therefore subsequent items or expressions (after the first non-NIL item) are not processed