I'm not seeing any output from my Hello World program.
$ cat hello.factor
USE: io
IN: hello
: hello ( -- ) "Hello World!" print ;
MAIN: hello
$ factor hello.factor
$
(No output)
$ factor -run=hello
Vocabulary does not exist
name "hello"
$ factor -run=hello hello.factor
$
(No output)
Factor now executes a MAIN function for command line scripts that specify one. (See GitHub)