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Messages - Ward [ switch to compact view ]

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General Software Discussion / Re: Excalibur 32-bit
« on: July 02, 2007, 08:52 AM »
I still don't think RPN is more logic - you have to break down expressions into fragments with RPN. HP probably just wrote that blurb because it's easier to do RPN than a complex expression evaluator ;)


I agree...And the idea of the RPN saving keystrokes is rubbish as well.  After each number you hit enter, then after the operator you hit enter.  So for 2 + 2 = 4 you end up with 6 keystrokes vs. 4 w/ a standard calculator.  Now for a much more complex equation, you still hit the enter after each keystroke, and unless you have a great many nested sub-equations requiring several Parentheses in a row, then you really loose keystrokes.  Even in those situations it is not as much a savings as you are led to believe.

Another point to argue is the more natural method as taught in school on paper.  I don't know what school(s) they are talking about, but I know a simple algebraic calculator allows me to enter the equation EXACTLY like I was taught in school.

The only "advantage" I can see is seeing the intermediate steps, but even this is trivially completed with a standard algebraic calculator.

So back to the original question - Why RPN?

You don't have to press enter after every number - just press the operation associated.

E.g. 2 then press enter, 2 again then press +. Exactly the same as a normal calculator. Enter is only used once. The more complex the calculation, the less keystrokes are required.

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Can I? Can I please have a copy to test?  :D


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