[nealabq]

After I got used to RPN (I had a lovely old HP-21) I found it much more intuitive. Stack-based thinking. No parentheses! (And I've used LISP for years, but that's entirely different.)

RPN vs Infix/Algebraic used to be a holy-war topic. Like emacs vs vi, or iPhone vs Android.

Once you go RPN, you can never go back again.

[TheLoneWolfling]

The one issue I've already had with RPN is that you require a separator between numbers anyways - in RPN it's too easy to parse "23 4 +" as "2 34 +", for example, especially if you're writing quickly.

[anonymouz]

On the HP calculators the separator would usually be the enter key. I think the old ones displayed just the top entry of the stack, on the newer ones with bigger display you see the stack with each entry on one line.

[orclev]

Might have been better to demonstrate that using subtraction as addition is commutative and thus either one works fine in this case.

[sokoloff]

One is 27; the other is 36.

[orclev]

LOL, apparently I suck as a parser. I read them as just swaps of the numbers, I.E. 23 4 + vs. 4 23 +.

[pavel_lishin]

I learned it for some scholastic competition once. You're right, after the initial confusion, it was fast and intuitive.

I've forgotten it all now, of course. How often do I need to calculate something?

[bitwize]

I know that feel, bro. ENT > =!