2^^4 2.72697e16 ^4 54.5982 2^54.5982 2.72707e16 The second ^ raises e to 4 or 6 power. Not sure about your expressions. On Feb 17, 2015 10:12 AM, "Fausto Saporito" <[email protected]> wrote:
> HI! > > I'm a new J user with a little experience of APL and LISP. > > In these days I'm playing with big numbers... very big indeed, and I > found a bug (?) in the exteded precision implementation of J. > > I'm not sure if I can call it a bug, but if I use the standard > precision number I got a "infinity" as result... as should be. > > I'm talking about knuth-up-arrow notation, to build the "tower of > power". In J the syntax is amazingly simple : ^/ 2 2 2 2 > > 2^^4 is 2 * (2* (2* 2)) = 65536 > > Now 2^^5 is _ with standard precision... but if I use x: (i.e. ^/ x: > 2 2 2 2 2) can get most of number... it's quite big indeed. > > The problem arises with 2^^6 or 3^^4 I get "limit error" instead of _ ... > why ? > > Is it an expected behaviour ? > > thanks in advance, > Fausto > ---------------------------------------------------------------------- > For information about J forums see http://www.jsoftware.com/forums.htm > ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
