[fend](https://fend.printfn.nz) 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.
## Installation
<a href="https://repology.org/project/fend/versions">
<img src="https://repology.org/badge/vertical-allrepos/fend.svg" alt="Packaging status">
</a>
Install `fend` by running `cargo install fend` in your terminal. Alternatively you can download the latest stable binaries [here](https://github.com/printfn/fend/releases/latest). fend is also available in the [AUR](https://aur.archlinux.org/packages/fend/).
You can then run `fend` to start a REPL session:
```
$ cargo install fend
...
$ fend
> 1 ft to cm
30.48 cm
>
```
## [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
```
```
> 1 1/2' to cm
45.72 cm
```
```
> 1 lightyear to parsecs
approx. 0.3066013937 parsecs
```
```
> (x: 2x) pi
approx. 6.2831853071
```
## License
fend is MIT-licensed. See [LICENSE.md](LICENSE.md) for more information.
fend optionally includes the GPLv3-licenced `definitions.units` and
`currency.units` data files from [GNU Units](https://www.gnu.org/software/units/).
This can be changed via the `gpl` feature defined in `core/Cargo.toml`.