How do you get the math pi?

pi is an irrational number, which if calculated as a decimal, will have an unending sequence of digits which never repeats.

You can use 3.14 or the fraction 22/7 as an approximation. There are tables with pi carried out to thousands of digits, as well as formulas to calculate the digits of pi using infinite series.

Scientific calculators as well as many spreadsheet software programs have a built-in value for pi, that can be accessed. See related link for more information.