Requires the latest stable Python version.
pip install kalk
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 tries to follow Python's syntax. Similar to Python, **
is the power operator and ^
is bitwise XOR:
>>> 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 and statistics modules are supported.
>>> 6 lgamma
4.787491742782047
and many more.
You can even do datetime
and timedelta
calculations:
>>> "2023-03-22" dt
2023-03-22 00:00:00
>>> 2 days 3 hours +
2 days, 3:00:00
>>> -
2023-03-19 21:00:00
Start a substack (a list) with a [
and end it with a ]
. Some functions require lists as argument. For example to calculate the distance between two points or sum of some numbers:
>>> [2 -1] [-2 2] dist
5.0
>>> [0 0 0] [1 1 1] dist
1.7320508075688772
>>> [1 1 1] sum
3
Handy operators:
<>
swaps the place of the last two values in the stack.c
clears the stackcp
copies the last result to clipboard.del
deletes the lastn + 1
values from from the stack withn
being the last value in the stack.e
adds Euler's number to the stackpi
adds the pi constant to the stackpst
pastes the contents of clipboard and evaluates it.a
the last answers
prints the stacksto
stores the value before the last in storage using the last stack value as the key.rcl
recalls the value in storage using the last stack value as the key.h
prints a list of all operators. (still needs lots of refinements.)?
prints the docstring of the operator given as a string. For example"<>" ?
will print the help string on swap. Note that not all functions have documentation yet.ctrl+c
(KeyboardInterrupt) will cancel the current input.exit
will quit the program.