Can you write a verb br which returns the binary representation of y without using #: or #. ?
br 0 0 br 2 1 0 br i. 5 0 0 0 0 0 1 0 1 0 0 1 1 1 0 0 br _13 |domain error: br | br _13 An inverse I like is bv =: (2 p.~ |.)"1 :. br bv br i. 5 0 1 2 3 4 ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm