Returns value of π.
The constant pi (π) is a mathematical constant that is the ratio of a circle's circumference to its diameter. It is approximately equal to 3.141593.
For example, you can use π in a calculation, such as finding the area of a circle with radius 5: area = [pi[] * 5 ** 2].
pi[]
#<result> = pi[] (print,#<result>)
result: 3.141593