Germany is a part of the Eurozone and uses the euro as its only currency, along with some other European countries.
One euro is comprised of 100 cents.
Notes come in seven different denominations: 500, 200, 100, 50, 20, 10 and 5 euros. There are eight coins: 2 and 1 euros, and 50, 20, 10, 5, 2, 1 cents.
You won’t get away with trying to use any foreign currencies in shops or other businesses – for example pounds or dollars will not be accepted. The only exception to this is inside airports or, occasionally, fast food restaurants in major train stations.