kalk 0.4.0

a simple cli RPN calculator written in Python

installation

Requires Python 3.9+.

pip install kalk

Usage

After installation run kalk from your terminal.

In RPN syntax one would first enter the operands and then the operator:

>>> 1
1
>>> 2
2
>>> +
3

You may also enter the operands and the operator in one line, just use space to separate them:

>>> 41 1 +
42

(tip: the space is not needed when the syntax is not ambiguous.)

Kalk follows Python syntax for numbers. It even support complex numbers.

>>> 1-.1e2J
(1-10j)

Therefore ** is the power operator and ^ is bitwise and:

>>> 3 3 **
27
>>> 3 3 ^
0

Kalk ignores , (thousands separator) within numbers.

>>> 1,234 1 +
1,235

Most of the functions defined in Python’s math module are supported.

>>> 6 lgamma
4.787491742782047

and many more:

>>> 1 2 3 4 5 sum
15

Handy operators:

• c clears the stack

• s prints the stack

• pi adds the pi constant to the stack

• e adds Euler’s number to the stack

• <> swaps the place of the last two values in the stack.

• h prints a list of all operators. (still needs lots of refinements.)

• cp copies the last result to clipboard.

• pst pastes the contents of clipboard and evaluates it.

• del deletes the last n + 1 values from from the stack with n being the last value in the stack.