HKC

a nice little calculator for my own personal usage.

Features

Polish Notation

+ 1 2 is 3, and exp - ln 21 ln 7 is also three (approximately).

Variables!

Prefix :a, :b, & :c to store (up to) three values! Also, ans does the same thing as on every other calculator.

Functions!

Prefix :f and use x to define a unary (one-argument) function, :g with x and y for a binary, and :h with x, y, and z for a ternary!

NB: functions do not close over their environments, e.g.

%> :a 1
1
%> :f / x a
%> f 4
4
%> :a 2
2
%> f 4
2

Equation-Solving!

:0 takes two (or three) arguments:

• an initial guess and a function to set to 0 (:0 1 x gives 0),
• or a specified precision and then those two things (:0 1e-10 5 ^x2 gives approximately 9.5e-6)

The default precision is 1e-15.

newest feature (as of the README's most recent update):

constants (pi, e)

Turns out I forgot to add them as a feature. My bad.