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Date: Thu, 04 Sep 2014 10:44:19 +0100
From: Peter Stephenson <p.stephenson@samsung.com>
To: zsh-users@zsh.org
Subject: Re: How to do thousands grouping in zsh?
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On Thu, 04 Sep 2014 16:52:23 +0800
Han Pingtian <hanpt@linux.vnet.ibm.com> wrote:
> Is there any other method?

=46rom 5.0.6, just released.

print $(( [#_3] 299792458 ))

299_792_458

It's always "_" because it's in the same format that's understood on
input.  You could postprocess it

print ${$(( [#_3] 299792458 ))//_/,}

pws