Formatting – Use of Comma in Numbers as Decimal Marker in German and Other European Languages

formattingmath-mode

In German the comma rather than the period is used as a decimal separator and the dot is used as a thousands separator: 12.345,67. The comma creates some unwanted space when used as in $12.345,67$ . Is there a light-weight package or some macro to support this? (I'm not looking for automatic formatting like insertion of a thousands separator.)

\documentclass{minimal}
\usepackage[utf8]{inputenc}

\begin{document}
Der Preis beträgt $12.345,67$ Euro.    
\end{document}

Der Preis beträgt $12.345,67$ Euro.

An easy fix is typing $12.345,{}67$ but I think this is too cumbersome.

Best Answer

Use the icomma package.

The effect can also be achieved with the siunitx package and its output-decimal-marker setting, although you'll have to pass numbers to the \num macro.

Related Solutions

Numbering Formatting – How to Display Numbers with Comma as Thousands Separator

I think the siunitx package has this sort of facility.

\num[group-separator={,}]{1234567890}

Should give you 1,234,567,890

Also you can use this as a package option like so: \usepackage[group-separator={,}]{siunitx}

Be warned, this doesn't seem to work with older versions of siunitx

[Tex/LaTex] Replace . (period) by , (comma) in numbers

I'm sure the siunitx package is the way to go because it will catch all corner cases. Out of curiosity, here is a simple solution that uses TeX's pattern matching capabilities.

\documentclass{minimal}
\def\usecomma#1.#2{#1,#2}
\newcommand\mycmd[1]{\usecomma #1}
\begin{document}
    \obeylines
    1.12 $\to$ \mycmd{1.12}
    5.32 $\to$ \mycmd{5.32}
\end{document}

Note that it won't work if you pass an argument that has no dot, like \mycmd{2}. Is this too simple and there is something else that I have overlooked?

Best Answer

Related Solutions

Numbering Formatting – How to Display Numbers with Comma as Thousands Separator

[Tex/LaTex] Replace . (period) by , (comma) in numbers

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