Some countries do not use the Euro because they have their own currency and do not wish to change, or at least not for a while.
When you go to some European countries you have to use a euro intead of a dollar.
The euro did not exist then. Different countries that now use the euro had their own currencies at that time. Some countries that now use it, did not exist during that time.
No. There are 28 countries in the organisation known as the European Union. Only 19 of those countries use the Euro. A county in the European Union has the choice of using the Euro or not. Some countries have chosen not to use it or their economies are not ready to use it.
The currency is called the Euro, not the Euro Dollar. Not all countries in the European Union use the Euro. There are 28 countries that are members of the European Union. 18 use the Euro. 10 use their own currencies.
Europe does not have one single currency. The most widely used currency is the Euro, which is the official currency in 18 countries of the European Union. The other 10 countries in the European Union do not use the Euro. Not all of Europe's countries are in the European Union but some of the European countries outside the European Union use the Euro. The majority of countries in Europe do not use the Euro.
As of the 1st of January 2014, 18 of the European Union's 28 countries use the euro.
Denmark did not leave the EU. It is still a member. It does not use the Euro, but that does not mean it is not in the EU. Some other EU countries do not use the Euro. Only 19 of the 28 member countries use it.
Some countries in the European Union have chosen to retain their own currencies. Others have not reached the conditions required to join yet, but may join in the future. 17 use it and 11 do not. See the related questions for lists of the countries that are use the Euro and do not use the Euro.
The Euro is the same for all countries that use it, though one side of the coin is different in each country. All the notes are the same for all countries. You can still use those different coins in any of the countries that use the Euro. Not all countries in Europe use the Euro. There are over 50 countries in Europe. 28 of them are members of an organisation called the European Union. 18 of those 28 countries use the Euro as their currency.
17 countries use the euro, as of 1/1/11They areAustriaBelgiumCyprusEstoniaFinlandFranceGermanyGreeceIrelandItalyLuxembourgMaltaNetherlandsPortugalSlovakiaSloveniaSpain16 countries now use the Euro. This will grow in the coming years.
There is no country called Urania, so you may mean some other county. See the related question below for the countries that do use the euro.