[Tutor] How to calculate pi with this formula?

[Barry Sperling]

As a quick thought:  since you will not be interating forever, if you 
know how far you will go you can calculate that denominator and 
numerator by a formula, add 1, multiply that answer by the previous 
denominator and numerator, add 1, etc. until the denominator gets down 
to 1.  It has a slightly different flavor that the previous ( formula 23 ).
Barry

Dick Moores wrote:

> Is it possible to calculate almost-pi/2 using the (24) formula on 
> <http://mathworld.wolfram.com/PiFormulas.html> without using (23)?
> 
> If it's possible, how about a hint? Recursion?
> 
> Thanks, tutors.
> 
> Dick Moores
> rdm at rcblue.com
> 
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