# $productList->currency()

> Gets the currency of this List

- Source: `src/ListItems.php#L54` <https://github.com/wagnerwagner/merx/blob/2.0.0-alpha.11/src/ListItems.php#L54>

```php
$productList->currency(): string|bool|null
```

## Return type

`string|bool|null`

Three-letter ISO currency code, in uppercase. E.g. EUR or USD.
                         Returns false if the currencies are mixed.
                         Returns null if none of the ListItems have a price with a currency.

## Parent class

`Wagnerwagner\Merx\ProductList` inherited from `Wagnerwagner\Merx\ListItems`