The currency of USA is the American dollar divided into 100 cents normally written as $ or US$. It is usually issued in denominations of $ 1, $ 5, $ 10, $ 20, $ 50 and $ 100 etc. Coins are issued in denominations of 1 cent, 5 cents, 10 cents, 25 cents and 50 cent known as penny, nickel, dime, quarter and half-dollar respectively.

You could exchange your country's currency for US Dollar at major airports, banks and private exchange companies.