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how do I do this equation

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Pommie

Well-Known Member
Most Helpful Member
I now remember when I last used reverse polish, it was on a Sinclair Spectrum, using the operating system to do a calculation in assembly. Everything had to be stacked in RPN before calling the expression evaluator.

That's got to be 25 years ago!!

Mike.
 

eblc1388

Active Member
Ron H said:
That's why I like my old HP15C (which stays at work). RPN, no parentheses or brackets required.
The calculator I use here at home when sitting at my computer is an HP41 emulator.

One don't just like RPN, one is addicted to it. I HAVE to use a RPN even I have several other non RPN types.

I feel very uncomfortable if I am forced to use a non-RPN type and have to write down the immediate results I already worked out. No such worry with a RPN.
 

Nigel Goodwin

Super Moderator
Most Helpful Member
eblc1388 said:
One don't just like RPN, one is addicted to it. I HAVE to use a RPN even I have several other non RPN types.

I feel very uncomfortable if I am forced to use a non-RPN type and have to write down the immediate results I already worked out. No such worry with a RPN.

Not very good for PIC's then! - RPN relies on a decent size stack - but if you like RPN you'll probably enjoy using Forth.
 

dknguyen

Well-Known Member
Most Helpful Member
Pommie said:
You shouldn't have to enter the brackets. You should have a key to enter the exponent. It is usually labeled E or Exp. So to enter 4.91*10^12 you would enter 4.91E12 or 4.91Exp12.

Wow, I just went to check on my daughters TI84 and it doesn't have an Exponent key. Calculators seem to have gone backward :confused: I guess that you have to enter the brackets after all.

Mike.

I never use the exponents key because it never looks quite right to me.
 
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