Calculate Eulers number (e)

calculate-e.py

# https://www.facebook.com/groups/progfml/permalink/344454616128233/
from math import factorial

e=0
n=0
step_length=1
e_right=2.71828
margin_of_error=0.001
Klart=False

while Klart != True:

    for k in range (0,n+1):
        a=factorial(k)
        e=e+1/a
        print("a=%d,  1/a=%f,  e=%f" % (a, 1/a, e))

    difference= e_right - e

    if difference <= margin_of_error:
        Klart=True

    if difference > margin_of_error:
        n=n+1

print (n,e,difference)