Re: [FWP] algorithm to calculate pi

[sthoenna@efn.org (Yitzchak Scott-Thoennes)]

In article <200006260449.AAA09579@pollen.cs.concordia.ca>,
Michael Assels <mjassels@cs.concordia.ca> wrote:
>                        On Sun, 25 Jun 2000 20:15:21 PDT,
>                               "Perl lover" wrote:
> 
> :But if you read the C program.. the precision is the whole point
> :here. I tried to play with Math::BigFloat.. seems can't
> :come up with something easy..
> 
> How about this:
> 
>    use Math::BigFloat;
>    my $p = new Math::BigFloat "0";
>    for(0..280){
>       my $i=$_*8;
>       $p += (16**-$_)*(4/($i+1)-2/($i+4)-1/($i+5)-1/($i+6));
>    }
>    print $p;

Doesn't work.  Even if you make $i a BigFloat too.  Perhaps the series
needs to be longer?

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