| #### D.2.3.11 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

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