﻿ Python Math: Compute the value of e using infinite series - w3resource

# Python Math: Compute the value of e using infinite series

## Python Math: Exercise-65 with Solution

Write a Python program to compute the value of e(2.718281827...) using infinite series.

Sample Solution:-

Python Code:

``````'''
#https://gist.github.com/thinkphp/1528363

1 + 1/1! + 1/2! + 1/3! + ...
2 + 1/2! + 1/3!+ ...
'''
import math

def fact(n):
if n == 0:
return 1
else:
return n*fact(n-1)

def e(EPS):

v1 = 2
v2 = v1 + float(1.0/fact(2))
i = 3
while math.fabs(v1-v2) >= EPS:
v1 = v2
v2 += float(1.0/fact(i))
i += 1
return v2

print("The mathematical constant e")
#computes the value of e using infinite series
print(e(0.00000001))
#mathematical constant e build-in
print(math.e)
```
```

Sample Output:

```The mathematical constant e
2.7182818282861687
2.718281828459045
```

Flowchart:

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## Python: Tips of the Day

Getting rid of unwanted characters:

You can get rid of whitespaces or any specific character using strip methods in Python. You can use either plain strip for both sides, lstrip for the left side and rstrip for the right side only.

```str="+++Welcome python+++"
str.strip()

print(str)```

Output:

`+++Welcome python+++`