From: Jay Anderson <horndude77@...>
Date: 2010-01-18T13:20:14+09:00
Subject: Re: Digits of e (#226)

> ## Digits of e (#226)
> 
> This week�s quiz is to write a Ruby program that can compute the first
> 100,000 digits of e.

$ cat e.rb
digits = 100000
fudge = 10
unity = 10**(digits + fudge)
e = unity
n = unity
i = 0
while (n>0)
  i += 1
  n /= i
  e += n
end
e /= 10**fudge
p e
$ time ruby e.rb > /dev/null

real  0m4.023s
user  0m3.940s
sys  0m0.087s

This uses the taylor series definition of e which actually converges 
quite fast.

-----Jay
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