Totally useless trivia... 41 Ángel Martin Posting Freak Posts: 1,253 Threads: 117 Joined: Nov 2005 12-07-2011, 07:48 AM you've been warned... Incidentally I came across that while looking for a 41-MCODE routine to calculate the sum of digits of a given number - anybody remembers where that'd be? bill platt Posting Freak Posts: 2,448 Threads: 90 Joined: Jul 2005 12-07-2011, 09:26 AM ironically the 41c is not mentioned. Don Shepherd Posting Freak Posts: 1,392 Threads: 142 Joined: Jun 2007 12-07-2011, 09:38 AM I don't know about MCODE and the HP-41, but here's a nice little HP-17b solver equation that gives you the sum of digits of a number. It even works on the newer HP-17bii+. ```SOD=(I:0:LOG(N):1:MOD(IDIV(N:10^I):10)) ``` « Next Oldest | Next Newest »

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