@stdlib/string/num2words/README.md

String manipulation functions.

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# num2words

> Convert a number to a word representation.

<section class="intro">

</section>

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<section class="usage">

## Usage

```javascript
var num2words = require( '@stdlib/string/num2words' );
```

#### num2words( value\[, options] )

Converts a number to a word representation.

```javascript
var out = num2words( 87 );
// returns 'eighty-seven'

out = num2words( 23101 );
// returns 'twenty-three thousand one hundred one'

out = num2words( 0.53 );
// returns 'zero point five three'
```

The function accepts the following `options`:

-   **lang**: `string` indicating the language. Default: `'en'`.

By default, the function returns a word representation of a number in English. To return a word representation of a number in a different language, set the `lang` option.

```javascript
var out = num2words( 22, {
    'lang': 'de'
});
// returns 'zweiundzwanzig'

out = num2words( 0.53, {
    'lang': 'de'
});
// returns 'null Komma fünf drei'
```

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## Notes

-   The following languages are supported:

    -   **en**: English.
    -   **de**: German.

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<section class="examples">

## Examples

<!-- eslint no-undef: "error" -->

```javascript
var num2words = require( '@stdlib/string/num2words' );

var out = num2words( 29 );
// returns 'twenty-nine'

out = num2words( 113 );
// returns 'one hundred thirteen'

out = num2words( 13.52 );
// returns 'thirteen point five two'

out = num2words( 47, {
    'lang': 'de'
});
// returns 'siebenundvierzig'
```

</section>

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* * *

<section class="cli">

## CLI

<section class="usage">

### Usage

```text
Usage: num2words [options] [<string>]

Options:

  -h,    --help                Print this message.
  -V,    --version             Print the package version.
         --split sep           Delimiter for stdin data. Default: '/\\r?\\n/'.
         --lang lang           Language. Default: 'en'.
```

</section>

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<section class="notes">

### Notes

-   If the split separator is a [regular expression][mdn-regexp], ensure that the `split` option is either properly escaped or enclosed in quotes.

    ```bash
    # Not escaped...
    $ echo -n $'15\n23' | num2words --split /\r?\n/

    # Escaped...
    $ echo -n $'15\n23' | num2words --split /\\r?\\n/
    ```

-   The implementation ignores trailing delimiters.

</section>

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<section class="examples">

### Examples

```bash
$ num2words '10'
ten
```

To use as a [standard stream][standard-streams],

```bash
$ echo -n '23' | num2words
twenty-three
```

By default, when used as a [standard stream][standard-streams], the implementation assumes newline-delimited data. To specify an alternative delimiter, set the `split` option.

```bash
$ echo -n '10.3\t23.1' | num2words --split '\t'
ten point three
twenty-three point one
```

</section>

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</section>

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<section class="links">

[standard-streams]: https://en.wikipedia.org/wiki/Standard_streams

[mdn-regexp]: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Regular_Expressions

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