Number of Terms:
Actual Pi:

How it works:

This is how all those Maths Boffs work out pi to 1000 decimal places...But because you only have at MOST a pentium 400, you can only do it to about 2 or possibly 3 decimal places.

What it does - The maths side:
well, did you know that: pi/4 = 1 -1/3 + 1/5 - 1/7 + 1/9 - 1/11 + 1/13 - 1/15 .....And it goes on for ever.
Do you see the pattern? well there is one! And there are in infinite number of terms. Your computer is able to calculate up to about 10,000 terms before you start to notice the time delay. I have made it so that you can change the number of terms it works out.

Although there's little use for this, It MOST CERTAINLY can be used for EDUCATIONAL perposes, progressions, sequences etc.