mod10-check-digit
Calculate the check digit(mod10 algorithm)
Table of Contents
Table of Contents
Install
Usage
CLI
Contribute
License
## Install
```sh
$ npm install --save mod10-check-digit
# OR
$ yarn add mod10-check-digit
```
## Usage
Module exports a single function that takes a number `string` as argument and returns the check digit `number`.
```js
const mod10CheckDigit = require('mod10-check-digit')
console.log(mod10CheckDigit('9202204720082')) // 2
console.log(mod10CheckDigit('7992739871')) // 3
console.log(mod10CheckDigit('7240157335352')) // 4
```
## CLI
```sh
$ npm install --global mod10-check-digit
# OR
$ yarn global add mod10-check-digit
```
Then:
```sh
$ mod10-check-digit 9202204720082
# 2
```
## Contribute
Contributions are welcome. Please open up an issue or create PR if you would like to help out.
Note: If editing the README, please conform to the [standard-readme](https://github.com/RichardLitt/standard-readme) specification.
## License
Licensed under the MIT License.
