Maybe this should be a language specific parameter.  How would you achieve a similar result with the Indian numbering system, for instance?

Also, decimal and thousands separators vary from country to country.  In France, for example, they use the comma for the decimal separator, and space for the thousand separator.

Clyde

From: ntg-context [mailto:ntg-context-bounces@ntg.nl] On Behalf Of Otared Kavian
Sent: Thursday, January 31, 2019 2:43 PM
To: mailing list for ConTeXt users
Subject: Re: [NTG-context] Automatic thousands separation in \unit

Hi Marco,

Can this give what you wish?

\define[2]\myunit{\spaceddigits{#1}\unit{#2}}

\starttext 

\myunit{123456789}{volt}

\stoptext

On 31 Jan 2019, at 13:28, Marco Patzer <lists@homerow.info> wrote:

Hi!

I'm wondering if there's a way to have automatic thousands separation in the
\unit command? \spaceddigits does that, but it doesn't work inside \unit. And
using both would be quite verbose to write. Example:

\starttext
 %% no thousands separation
 \unit{123456789 volt}

 %% manual thousands separation works
 \unit{123,456,789 volt}

 %% automatic thousands separation, but not using \unit
 \let\spaceddigitsseparator,
 \spaceddigits{123456789}\,V

 %% fails, no output
 \unit{\spaceddigits{123456789} volt}
\stoptext

Marco
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