[Lemur]

Description: Usage : puts euler(p) Refactor of http://www.dreaminco...snippet1660.htm Original Credit to: MitkOkReturn Euler's Number with p digits of precision Refactor of http://www.dreaminco...snippet1660.htm

require 'bigdecimal'

def euler(p)
  BigDecimal.limit(p+1)  
  f = BigDecimal.new 1  
  one = BigDecimal.new 1
  (2..150).reduce(2) { |e, i| e += one / (f *= i) }.to_s 'f'
end

[Lemur]

In Ruby, EVERYTHING returns a value. Use it to your advantage.