# How can I use “e” (Euler’s number) and power operation in python 2.7

Hello Guys, How are you all? Hope You all Are Fine. Today We Are Going To learn about How can I use “e” (Euler’s number) and power operation in python 2.7 in Python. So Here I am Explain to you all the possible Methods here.

## How can I use “e” (Euler’s number) and power operation in python 2.7?

1. How can I use “e” (Euler's number) and power operation in python 2.7?

I have modified the equation by replacing `1/2` as `0.5`. Else for Python <2.7, we'll have to explicitly type cast the division value to `float` because Python round of the result of division of two `int` as integer.

2. use “e” (Euler's number) and power operation in python 2.7

I have modified the equation by replacing `1/2` as `0.5`. Else for Python <2.7, we'll have to explicitly type cast the division value to `float` because Python round of the result of division of two `int` as integer.

## Method 1

You can use `exp(x)` function of math library, which is same as `e^x`. Hence you may write your code as:

```import math
x.append(1 - math.exp( -0.5 * (value1*value2)**2))
```

I have modified the equation by replacing `1/2` as `0.5`. Else for Python <2.7, we’ll have to explicitly type cast the division value to `float` because Python round of the result of division of two `int` as integer. For example: `1/2` gives `0` in python 2.7 and below.

## Method 2

Python’s power operator is `**` and Euler’s number is `math.e`, so:

``` from math import e
x.append(1-e**(-value1**2/2*value2**2))```

## Summery

It’s all About this issue. Hope all Methods helped you a lot. Comment below Your thoughts and your queries. Also, Comment below which Method worked for you? Thank You.