Pi is a dimensionless number that never ends and never repeats. The ratio of the circumference of a circle to the diameter. No matter what the size, divide the circumference (the distance around the circle) by the diameter and you will always get exactly the same number. Pi is also an irrational number.
- Abbreviated as \(\; \pi\)
- First 100 digits - \(\;3.1415926535\; 8979323846\; 2643383279\; 5028841971\; 6939937510\; 5820974944\; 5923078164\; 0628620899\; 8628034825\; 3421170679...\; \)