# rot13-cipher 
> [`ROT13`](https://en.wikipedia.org/wiki/ROT13) substitution cipher for Node.js. Example: `foobar` → `sbbone`
ROT13 is its own [inverse](https://en.wikipedia.org/wiki/Inverse_function). Meaning, to undo `ROT13`, the same algorithm is applied, so the same action can be used for encoding and decoding.
## Install
```bash
$ npm install rot13-cipher
```
## Usage
```js
const rot13Cipher = require('rot13-cipher');
rot13Cipher('hello world');
//=> 'uryyb jbeyq'
rot13Cipher('foo123bar');
//=> 'sbb123one'
rot13Cipher('foo!@bar')
//=> 'sbb!@one'
rot13Cipher('uryyb jbeyq')
//=> 'hello world'
```
## API
### rot13Cipher(string)
Takes one string input and returns the encoded veersion of it.
## Support
