SET TALK OFF
PUBLIC val1,val2
val1 = 10
val2 = 15
DO down
? val1
? val2
RELEASE ALL && Releases private variables only
DISPLAY MEMORY LIKE val?
RELEASE val1,val2 && Public variables must be released explicitly
DISPLAY MEMORY LIKE val?
PROCEDURE down
PRIVATE val1
val1 = 50
val2 = 100
? val1
? val2
RETURN