ENVIRONMENT? ENVIRONMENT-WORDLIST ENVIRONMENT?
ENVIRONMENT?
* ENVIRONMENT? ( a1 n1 -- false | ?? true )

check the environment for a property, usually
a condition like questioning the existance of
specified wordset, but it can also return some
implementation properties like "WORDLISTS"
(the length of the search-order) or "#LOCALS"
(the maximum number of locals) 
Here it implements the environment queries as a SEARCH-WORDLIST 

in a user-visible vocabulary called ENVIRONMENT

 : ENVIRONMENT?
   ['] ENVIRONMENT >WORDLIST SEARCH-WORDLIST
   IF  EXECUTE TRUE ELSE  FALSE THEN ;


 
 FORTH/ANS core  (dpANS.6.1.1345)   ordinary primitive