One-argument form See also two-argument form Right
The monadic function ¤ (pass) simply passes its argument through unchanged. The argument can be of any type, rank and shape; the result is identical.
Although at first sight this does not appear very useful, it can be used to force the display of a result which otherwise would be non-printing:
¤a„¼10 1 2 3 4 5 6 7 8 9 10