A currency converter is a calculator that converts the value of one currency into equivalent amounts of other currencies. For example, a traveler visiting Europe may want to convert $100 to euros using the dollar-euro exchange rate, or convert euros to British pounds using the euro-pound rate. The currency converter calculates conversions, allows the user to reset the values, and has an exit button to close the program. Checking currency exchange rates before traveling abroad helps users get the best value when exchanging money.