D.2.2.10 number_e

Procedure from library general.lib (see general_lib).

Usage:

number_e(n); n integer

Return:

Euler number e=exp(1) 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 e if printlevel > 0 (default:printlevel=0 )

Note:

procedure uses algorithm of A.H.J. Sale

Example:

LIB "general.lib";
number_e(30);"";
→ 2.71828182845904523536028747135
→ 
ring R = 0,t,lp;
number e = number_e(30);
e;
→ 13591409142295226176801437356763/5000000000000000000000000000000