# Python Number exp() Method

## Description

The exp() method in Python number is one of the Python Math functions that return the exponential of x: ex. Basically, it is used for calculating the power of E, and E here is called Euler’s number which is a mathematical constant and approximately equal to 2.71828. The exp() method in Python number helps the users in calculating the exponential value along with the base set to e. The input value for this function is the exponent value.

## Syntax

Following is the syntax for exp() method:

```import math

math.exp( x )```

Note − This function is not accessible directly, so we need to import math module and then we need to call this function using math static object.

## Parameters

• x − This is a numeric expression.

## Return Value

This method returns exponential of x: ex.

## Example

The following example shows the usage of exp() method.

```#!/usr/bin/python
import math   # This will import math module

print "math.exp(-45.17) : ", math.exp(-45.17)
print "math.exp(100.12) : ", math.exp(100.12)
print "math.exp(100.72) : ", math.exp(100.72)
print "math.exp(119L) : ", math.exp(119L)
print "math.exp(math.pi) : ", math.exp(math.pi)```

When we run above program, it produces following result:

```math.exp(-45.17) :  2.41500621326e-20
math.exp(100.12) :  3.03084361407e+43
math.exp(100.72) :  5.52255713025e+43
math.exp(119L) :  4.7978133273e+51
math.exp(math.pi) :  23.1406926328
```

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