Predefined Constants
 
WIDE provides a list of predefined constants, useful for metaprogramming.  These values can be included in expressions by enclosing them in double quotes, e.g., "cons".
The actual values of these constants are listed here:

var   =  nil4
cons   =  nil5
;   =  nil6
:=   =  nil7
while   =  nil8
if   =  nil9
quote   =  nil10
tl   =  nil2
hd   =  nil3