I would have used 50j48 ": ([: +/ %@:!)@i. 2 1 1 $ 30 40x except that
we want pi, instead of e.

For pi:

   50j48":<.@o.&.(*&(10x^48))1
3.141592653589793238462643383279502884197169399375

Thanks,

-- 
Raul

On Sun, May 15, 2022 at 1:37 PM David Lambert <b49p23t...@gmail.com> wrote:
>
> A global setting determines default floating print precision. Format
> accepts customization.  Rationals print to arbitrary base 10 representation.
>
>     9!:10''      NB. show print precision
> 6
>
>     1p1
> 3.14159
>
>     9!:11 ] 16   NB. set default
>
>     1x1
> 2.718281828459045
>
>     NB. customize
>     ":!.3 ] 2p1  NB. tauday.com
> 6.28
>
>
>     NB. compute 32 digits of Euler's number
>     50j48 ": ([: +/ %@:!)@i. 2 1 1 $ 30 35x
> 2.718281828459045235360287471352658602238073315078
> 2.718281828459045235360287471352662497757147554933
>     NB.                           ^xxxxxxxxxxxxxxxx
>
>     NB. view in fixed width please.
>
> https://www.jsoftware.com/help/dictionary/dx009.htm
>
>
> > Date: Sun, 15 May 2022 10:28:30 +0200
> > From: yt<yves.tan...@frmail.net>
> > To:programm...@jsoftware.com
> > Subject: Re: [Jprogramming] newbie question
> > Message-ID:<eee70943-3619-d8c6-fa5c-d71dc8d5f...@frmail.net>
> > Content-Type: text/plain; charset=UTF-8; format=flowed
> >
> >
> >    Dear All,
> >    i come back to start in J
> >
> >    in jijx>tour>overview
> >        3p5       NB. Pi (3 * Pi ^ 5)
> >    918.059
> >
> >    may be it is not the better way to find Pi :
> >        1p1       NB. Pi (1 * Pi ^ 1)
> >
> >        1p1
> >    3.14159
> ----------------------------------------------------------------------
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