The unicode symbol € does work, if you use a modern font that contains that symbol. :-)
The best practice is to use right symbol for right font. For Computer Modern fonts, eurosym is OK, or textcomp (using fonts provided by CM-super). See this FAQ for more packages:
http://www.tex.ac.uk/cgi-bin/texfaq2html?label=euro
I suggest Latin Modern fonts (using lmodern together with textcomp package), which is similar to Computer Modern. So you can use:
\documentclass{article}
\usepackage[utf8x]{inputenc}
\usepackage{lmodern,textcomp}
\begin{document}
€100
\end{document}
There are still some other font packages with euro symbol. If you use such font themes, use the euro symbol provided by the font package. For example, libertine, fourier and mathdesign package. Thus you can also use:
\documentclass{article}
\usepackage[utf8x]{inputenc}
\usepackage{libertine} % or \usepackage{fourier} or \usepackage[utopia]{mathdesign}
\begin{document}
€100 % or \texteuro100
\end{document}
Using XeLaTeX, most modern OpenType/TrueType fonts have euro symbols, including default Latin Modern fonts. You can use them directly:
% xelatex
\documentclass{article}
\usepackage{fontspec}% Latin Modern by default
% or \setmainfont{Whatever you want}
\begin{document}
€100
\end{document}
Best Answer
Even though Swiss francs are not an SI unit, the
siunitxpackage is really convenient to typeset numbers with units. You simply declare CHF a new unit withIf you now want to change the representation from CHF to, say, Fr. throughout the whole document, all you have to do is adjust the definition to
Here a full example: