Happy National Pi Day. Yup, pi, 3.14159265359... It’s the circumference distance around the edge) of a circle with a diameter (the distance across) of one.
First of all, the number of digits after the decimal point go on forever. The second part of this, however, is that THESE DIGITS NEVER REPEAT!
If you have a perfect circle that is one unit in diameter (one inch, one centimeter, one foot, whatever you choose from one point to the exact opposite point), then the distance around the circle will be pi units around.