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<head>
<title>UK TeX FAQ -- question label dec_comma</title>
</head><body>
<h3>The comma as a decimal separator</h3>
<p>If you use a comma in maths mode, you get a small space after it; this
space is inappropriate if the comma is being used as a decimal
separator. An easy solution to this problem, in maths
mode, is to type <code>3</code><code>{,}</code><code>14</code> instead of typing
<code>3,14</code>. However, if your language's
typographic rules require the comma as a decimal separator, such usage
can rapidly become extremely tiresome. There are two packages that
can help relieve the tedium: <i>icomma</i> and <i>ziffer</i>.
<p><i>Icomma</i> ensures that there will be no extra space after a
comma, unless you type a space after it (as in <code>f(x, y)</code>, for
instance), in which case the usual small space after the comma
appears. <i>Ziffer</i> is specifically targeted at the needs of
those typesetting German, but covers the present need, as well as
providing the double-minus sign used in German (and other languages)
for the empty 'cents' part of an amount of currency.
<dl>
<dt><tt><i>icomma.sty</i></tt><dd>Distributed as part of <a href="ftp://cam.ctan.org/tex-archive/macros/latex/contrib/was.tar.gz">macros/latex/contrib/was</a> (<a href="ftp://cam.ctan.org/tex-archive/macros/latex/contrib/was.zip">zip</a>, <a href="http://www.tex.ac.uk/tex-archive/macros/latex/contrib/was/">browse</a>)
<dt><tt><i>ziffer.sty</i></tt><dd><a href="ftp://cam.ctan.org/tex-archive/macros/latex/contrib/misc/ziffer.sty">macros/latex/contrib/misc/ziffer.sty</a>
</dl>
<p><p>This question on the Web: <a href="http://www.tex.ac.uk/cgi-bin/texfaq2html?label=dec_comma">http://www.tex.ac.uk/cgi-bin/texfaq2html?label=dec_comma</a>
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