NAME

rpcalc - reverse polish notation calculator

SYNOPSIS

calc [values...]

DESCRIPTION

A postfix calculator built in rust, with a companion bash script for a CLI. When ran with no arguments, it enters a calculator “shell” which can exited with “q”.

When inside this shell, you can save functions or constants by starting a line with “def”, and you can then recall this saved value with “fn”.

FUNCTIONS

+

addition

-

subtraction

*, x

multiplication

/

division

%

modulo

^

power

log

logarithm

rnd

round

ln

natural log

log2

log base 2

log10

log base 10

sin

sine

cos

cosine

tan

tangent

csc

cosecant

sec

secant

cot

cotangent

arcsin

inverse sine

arccos

inverse cosine

arctan

inverse tangent

arccsc

inverse cosecant

arcsec

inverse secant

arccot

inverse cotangent

!

factorial

CONSTANTS

e

natural number, 2.71828

G

gravitational constant, 6.6743E-11

g

earth’s gravity, 9.81

c

speed of light, 2.71828

pi

mathematical pi, 3.14159

EXAMPLES

$ calc 2 2 +
> 4

$ calc pi 2 / sin
> 1

$ echo "entering calc shell"
> entering calc shell
$ calc
calc$  2 2 +
  ==>  4
calc$  pi 2 / sin
  ==>  1
calc$  def 2 * 1 +
calc$  4 fn
  ==>  9
calc$  10 fn
  ==>  21
calc$  q
$ echo "back in normal shell now"
> back in normal shell now