Variable: math-approx-pi

math-approx-pi is a variable defined in calc-ext.el.gz.

Value

(float 3141592653589793238463 -21)

Documentation

An approximation for pi.

Source Code

;; Defined in /usr/src/emacs/lisp/calc/calc-ext.el.gz
;;; Betcha didn't know that pi = 16 atan(1/5) - 4 atan(1/239).   [F] [Public]
(defconst math-approx-pi
  (math-read-number-simple "3.141592653589793238463")
  "An approximation for pi.")