Posted by Jordan Miller on 10/10/53 11:26

http://us3.php.net/manual/en/ini.core.php#ini.precision

precision sets the number of significant digits, *NOT* the number of
digits displayed after the decimal point.

If you want to get pi out to 16 decimal places you need a precision
of *17* because the beginning 3 is a significant digit.

Your code does exactly this, displaying pi with 15 decimal places.

Jordan



On Sep 1, 2005, at 8:06 AM, Wong HoWang wrote:

> Dear all,
>
> I'm trying to do like this but failed:
>
> <?php
> ini_set('precision',16);
> echo pi();
> ?>
>
> How can I get more digits after . ?
>
> Can anyone help? Thx!
>
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