Bill Allombert on Sun, 07 Jan 2024 23:32:38 +0100


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Re: printf "%'d" missing in Pari/GP for printing 1000s commas 

On Sun, Jan 07, 2024 at 05:42:38PM +0100, hermann@stamm-wilbrandt.de wrote:
> In C
> 
>     setlocale(LC_NUMERIC, "");
>     printf("%'d\n", 1123456789);
> 
> outputs:
> 
>     1,123,456,789

Note that this is not part of C99. 

> Is there a more general solution?

You can do:

f(n)=my(V=strsplit(Str(n)));forstep(i=#V-3,1,-3,V[i]=concat(V[i],","));concat(V)

Cheers,
Bill