: foobar 2 [ 2 , ( '[' turns the compiler off, allowing us to execute code ) 1 1 1 + + , ( and we compile in-line a 2 and a three ) ( the '2' means 'push the number following this' ) ] + . cr ; foobar : 'foobar ' foobar ; ( ' can only be run inside the compiler ) ( ' leaves the address of the following word on the stack ) 'foobar . cr 'foobar dump