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Python  math.e property example
0
points
The Math.E
property returns e mathematical constant (2.718281828459045...
).
e
is called Euler's number or Napier's constant. However, it was discovered by Jacob Bernoulli. It is a mathematical constant used as the base of the natural logarithm.
import math
print(math.e) # 2.718281828459045
print(math.exp(1)) # 2.718281828459045
print(math.exp(2)) # 7.38905609893065
print(math.exp(3)) # 20.085536923187668
1. Documentation
Syntax 

Result  e number (2.718281828459045... ). 
Description 

2. e
number approximation example
To calculate e
the following function with infinity series can be used to get a better precision infinite number of iterations with big precision numbers.
import math
def calculateE(iterations):
return sum(1 / float(math.factorial(i)) for i in range(iterations))
print(calculateE(1)) # 1.0
print(calculateE(2)) # 2.0
print(calculateE(5)) # 2.708333333333333
print(calculateE(10)) # 2.7182815255731922
print(calculateE(20)) # 2.7182818284590455