Pi is the ratio of the circumstance to the diameter of any given circle.
It is approximately
3.14159
But since it is an irrational number it cannot be express exactly in digits.
It is irrational, and does not have an end, but it can be expressed to 100 or 200 digits of Pi
Here
100: http://www.miniwebtool.com/first-n-digits-of-pi/?number=100
200: http://www.miniwebtool.com/first-n-digits-of-pi/?number=200