currency
The word 'valuta' in Italian is used to refer to currency in general, whether it be coins or banknotes. It can also refer to the monetary system of a specific country. For example, 'la valuta dell'Italia' means 'the currency of Italy'.
The currency of this country is the euro.
This sentence is used to express that the official currency, or 'valuta', used in a particular country is the euro. It establishes the relationship between a country and its official medium of exchange.
I am studying the currency of Japan.
Here, 'valuta' refers to the monetary or currency system of a country. In this context, the speaker is implying that they're learning about the currency used in Japan, which is the yen.
You can exchange the currency at the airport.
This sentence suggests that it is possible to exchange, or 'cambiare', one type of 'valuta' or currency for another at an airport. Currency exchange facilities are commonly available at international airports for travelers.