Returns the value of Pi, 3.14159265358979, accurate to 15 digits.
This expression has no parameters.
A decimal number with the value of Pi, 3.14159265358979, accurate to 15 digits.
Pi is a mathematical constant. In DAX, Pi is represented as a real number accurate to 15 digits, the same as Excel.
Contributors: Alberto Ferrari, Marco Russo
MSDN documentation: https://msdn.microsoft.com/en-us/query-bi/dax/pi-function-dax