Command that closes the named file. All subsequent attempts to read or write to the file will fail.
You can also close the reserved file
"clipboard with this command.
OPENWRITE "dummy.fil SETWRITE "dummy.fil PRINT "Hello PRINT [Good Bye] SETWRITE  CLOSE "dummy.fil OPENREAD "dummy.fil SETREAD "dummy.fil REPEAT 2 [SHOW READLIST][Hello] [Good Bye]
SETREAD  CLOSE "dummy.fil