[fend](https://printfn.github.io/fend-website) is an arbitrary-precision unit-aware calculator.
This is the cross-platform CLI for fend.
Unique features:
* Arbitrary-precision arithmetic using rational numbers
* Full support for complex numbers
* Binary, octal, hexadecimal and all other bases between 2 and 36
* Keep track of units, with support for SI, US and UK customary and many historical units
* Emacs-style CLI shortcuts
* Trigonometric functions
* Lambda calculus
See the [manual](https://github.com/printfn/fend/wiki) for more information.
## [Web Interface](https://printfn.github.io/fend-website)
fend is available on the web at [printfn.github.io/fend-website](https://printfn.github.io/fend-website).
## Installation
The easiest way to install fend locally is via your package manager.
On systems with Rust:
```bash
rustup update
cargo install fend
```
On Arch Linux from the AUR (using `yay`):
```bash
yay -Sy aur/fend
```
Using the nix package manager:
```bash
nix-env -iA nixpkgs.fend
```
You can also download the latest stable binaries [here](https://github.com/printfn/fend/releases/latest).
Once fend is installed, run `fend` to start a REPL session:
```
$ fend
> 1 ft to cm
30.48 cm
>
```
### Packages
* [AUR](https://aur.archlinux.org/packages/fend/)
* [nixpkgs](https://github.com/NixOS/nixpkgs/blob/master/pkgs/tools/misc/fend/default.nix)
## [Manual](https://github.com/printfn/fend/wiki)
You can find the fend manual [here](https://github.com/printfn/fend/wiki).
## Examples
```
> 5'10" to cm
177.8 cm
```
```
> cos (pi/4) + i * (sin (pi/4))
approx. 0.7071067811 + 0.7071067811i
```
```
> 0b1001 + 3
0b1100
```
```
> 0xffff to decimal
65535
```
```
> 100 °C to °F
210 °F
```
```
> 1 lightyear to parsecs
approx. 0.3066013937 parsecs
```
```
> temperature = 30 °C
30 °C
> temperature to °F
86 °F
```
## License
fend is MIT-licensed. See [LICENSE.md](LICENSE.md) for more information.