.github/workflows | ||
kalk | ||
kalk_cli | ||
kalk_mobile | ||
kalk_web | ||
res | ||
.gitignore | ||
Cargo.lock | ||
Cargo.toml | ||
example.png | ||
LICENSE | ||
README.md |
kalk
Kalk is a calculator (both program and library) that supports user-defined variables, functions, and units (experimental, limited). It runs on Windows, macOS, Linux, Android, and in web browsers (with WebAssembly).
Features
- Operators: +, -, *, /, !
- Groups: (), ⌈⌉, ⌋⌊
- Pre-defined functions and constants
- User-defined functions and variables.
f(x, y) = xy
,x = 5
- User-defined units (experimental).
unit m = cm/100
,2m/50cm
,50cm to m
- Understands fairly ambiguous syntax. Eg.
2sin50 + 2xy
- Syntax highlighting
- Special-symbol completion on tab. Eg. write
sqrt
and press tab. It will be turned into√
. - Sum function:
sum(start, to, expression)
Eg.sum(1, 3, 2n+1)
is the same as2*1+1 + 2*2+1 + 2*3+1
=15
- Load a file including predefined functions and constants. For example, if you're going to use Kalk for physics, you load up your file with physics functions/constants when starting Kalk.
-i file
- Misc: separate expressions by a semicolon to write them on the same line, use the
ans
variable to get the value of the previously calculated expression.
Libraries
There are currently three different libraries related to kalk.
- kalk: The Rust crate that powers it all.
- @paddim8/kalk: JavaScript bindings to
kalk
. This lets you use it in the browser, thanks to WebAssembly. - @paddim8/kalk-component: A web component that acts as a frontend to
@paddim8/kalk
, which lets you use kalk in the browser with a command line-like interface.
Installation
Binaries
Pre-compiled binaries for Linux, Windows, and macOS (64-bit) are available in the releases page.
Compiling
Minimum rust version: v1.36.0. Make sure you have diffutils
gcc
make
and m4
installed. If you use windows: follow the instructions here (don't forget to install mingw-w64-x86_64-rust
in MSYS2).
Cargo
Run cargo install kalk_cli
Manually
- Go into the
kalk_cli
directory. - Run
cargo build --release
- Grab the binary from
targets/release
Syntax
A more complete reference can be found on the website
Functions
Defining: name(parameter1, parameter2, ...) = expression
Example: f(x) = 2x+3
Using: name(argument1, argument2)
Example: f(2)
Variables
Defining: name = expression
Example: x = 3
Using: name
Example: x
Units (experimental, are likely to not work properly)
Note: You only need to define the relationship between two units once. You will be able to convert between both of them.
Defining: unit
name = expression
Example: unit deg = (rad*180)/π
Using: Use them freely in expressions.
Example: 2m/50cm
Converting: expression to
unit
Example: 2 m to cm