We don't have that kind of locale support right now, but you could use
something like:

: number>string-with-commas ( str -- str' )
    number>string "." split1
    [ reverse 3 <groups> "," join reverse ] dip
    [ "." glue ] when* ;



On Fri, Jun 16, 2017 at 4:18 PM, Alexander Ilin <ajs...@yandex.ru> wrote:

> Hello!
>
>   Is there a standard way to output a number with comma separators
> grouping the thousands?
>
> ```
>   1,000,000 num>str-grouped
>
>   "1,000,000"
> ```
>
> ---=====---
>  Александр
>
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