The euro currency symbol is not natively supported in LaTeX. With a little effort, however, this feature can be added. In fact, there are several ways to insert a euro sign in a LaTeX document. My favourite way is to use the greek option of the babel package. Simply put \usepackage[greek,<optional other language>]{babel} in your preamble. (Some people might need to prefix that with \usepackage[LGR,T1]{fontenc} depending on their local configuration.) Now, the euro currency symbol can be inserted by putting \textgreek{\euro} in your LaTeX source. There are two reasons why I prefer to get the euro currency symbol this way. First, because the babel package is installed everywhere I use LaTeX, so I do not need to install additional packages and/or fonts. Second, because it offers the official sans-serif currency symbol and nothing else. (The famous ''zero, one or infinite many'' rule.)

Note that there is only one official euro symbol that is defined rather strict. Nowadays it is en-vogue to adapt the symbol to the surrounding font, which in turn has led to numerous (ugly) versions. Some might like the Adobe euro fonts (offering sans, serif, mono versions in regular, italic, bold and bold-italic for both the mac and the ms windows platform), but I stick to the one official symbol.

There are, of cause, several euro currency symbol packages. Below is a random selection of packages that can be used to get a euro currency symbol. Each row lists the name of the package, the number of different euro symbols and the pro's and con's. Note that the pro's and con's are mine.

package number pro's con's textcomp 1   ugly, needs fonts support eurosans 1 strict euro   europs n offers choice   eurosym 4 offers choice ugly

Descriptions of and usage instructions for the textcomp, eurosans and europs packages as well as a lot of information on the euro symbol can be found on this page.

The eurosym package can be downloaded from several places; for example as a .zip file from the ac-poitiers site.

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