A currency is a form of money that is used in a particular country or region. It can be in the form of banknotes, coins or electronic money, and is used for the purchase of goods and services, as well as for financial transactions such as transfers and investments. Each country has its own national currency, which has its own unique code and symbol. For example, the US dollar has the symbol "$" and the code "USD", and the euro has the symbol "€" and the code "EUR". Exchange rates are constant...
