Re: TI-83 Plus IS> and DS< program commands Message #2 Posted by Ivan Nejgebauer on 26 Apr 2010, 4:02 a.m., in response to message #1 by Don Shepherd
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They seem to operate exactly like HP RPN ISG and DSE, but the manual states that "they are not looping instructions." Why would it say that?
Because they aren't? (And I'm not trying to be snarky.) In the strictest technical sense, ISG and DSE are conditional skip instructions, which are great for implementing loops, and indeed that is their primary purpose -- but the skipped instruction doesn't have to be a GTO.
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Why else would you use these? Why are they even included in a non-RPN calculator?
I vaguely remember using ISG/DSE for purposes other than looping in some programs I wrote a very long time ago. I'll try to dig up an example, but don't hold your breath. (It's all written down on paper... somewhere.)
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