Returns the logical OR of a list of expressions
Supported Platforms: Windows and Mac OS
(or [expr ...])
Type: Integer, Real, String, List, Subroutine, Ename (entity name), T, or nil
The expressions to be evaluated.
The or function evaluates the expressions from left to right, looking for a non-nil expression.
Type: T or nil
T, if a non-nil expression is found; otherwise nil, if all of the expressions are nil or no arguments are supplied.
Note that or accepts an atom as an argument and returns T if one is supplied.
(or nil 45 '()) T (or nil '()) nil