Pi is an irrational number, which can be approximated by fractions of rational numbers. By definition, Pi is the ratio of circumference to diameter of every circle, and is always the same number, no matter which circle you use to compute it.

π ≈ 3.1415..

And can YOU name the digits of pi (π)? How far can you go? Tell us in the comments below. And be honest, please!

More Info: en.wikipedia.org