There is no actual EU currency. 19 of the 28 countries use the Euro, so this is sometimes thought of as being the EU currency. The other 9 countries in the European Union do not use the Euro and continue to use their own currencies.
What was once called the EEC, is now the EU or European Union. The EU has many currencies. 18 of its 28 members use the Euro, but as there are other currencies, neither it nor any others can be said to be the EU currency.
The economy in Sweden is strong, and the fastest growing in the EU, as of 2011. If you're refering to the currency, it is called 'krona' and the currency code is SEK.
EUros
euro
the euro
EU, I think means euro, like the currency of Europe €
If EU represent EURO currency, the advantage is that in Europe many countries have adopted EU for transactions. Tourists and travellors need not exchange currency.
Hungary joined the EU in 2004, but has not yet joined the Euro currency.
Franks.
Capital - Paris Currency - Euro and Francs
The euro is the current Italian currency. Italy is a member of the European Union. Use of the euro isn't a requirement of EU membership. For example, Sweden is an EU member that doesn't use the euro. Italy is an example of an EU member that does.
The biggest savings is in trade between one country and the EU, or between the EU states. Conversion of currency is complex and needs a vast accounting system. Businesses would need to hedge against currencies if they sell products in different countries that use different currencies. One common currency in the EU makes this process much easier. Another advantage to the EU states is the power of their currency as a reserve currency for the world. A currency held by many states is more attractive as a reserve currency as the market for the currency is more liquid.