Procedure from library general.lib (see general_lib).
Usage:
number_pi(n); n positive integer
Return:
pi (area of unit circle) up to n decimal digits (no rounding)
- of type string if no basering of char 0 is defined,
- of type number, if a basering of char 0 is defined
Display:
decimal format of pi if printlevel > 0 (default:printlevel=0 )
Note:
procedure uses algorithm of S. Rabinowitz
Example:
LIB "general.lib";
number_pi(11);"";
→ 3.1415926535
→
ring r = (real,10),t,dp;
number pi = number_pi(11); pi;
→ 3.1415926536
User manual for Singular version 2-0-4, October 2002,
generated by texi2html.