rpnKalc Alpha review

rpnKalc is a very simple rpn (reverse polish notation) calculator

License: GPL (GNU General Public License) File size: 12K Developer: tardigrade

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rpnKalc is a very simple rpn (reverse polish notation) calculator. Be warned I know very little about math and programming. Do not use for anything important such as money.

I am posting this in hope that i can get feedback on usability (things like keyboard commands) and if it functions proper.

Usage:
where #: is a place in the stack
d = drop
s = swap
n = sign change (1:)*(-1)
p = to the power 2:^1:
r = 1:root(2:)
+ = addition
- = subtracion
* = Multiplication
/ = division
Things that don't yet exist.
add trig functions
e
ln
log
variables
abs
pi
modules %

Requirements:
SuperKaramba