After watching a math video on YouTube I started to investigate the implementation of alternating sequences in J.
Using the site search function, (alternating sequences site:jsoftware.com) I discovered an entry in the NYCJUG of 2022-11-08 which contains an excellent example: calce=: 13 : '%-/%!2+i.x: y' calce 10 3991680r1468457 20j18":calce 10 NB. Format rational to 20-digit decimal with 18 places past the decimal 2.718281842777827338 Using this as a startpoint, I followed the logic thru but couldn't understand why 2 is added to i. x: y Removing the 2+ doesn't seem to affect the result in any of the cases I tried. Thanks in advance, Richard ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
