# Python math library | exp() method

Python has math library and has many functions regarding it. One such function is exp(). This method is used to calculate the power of e i.e. e^y or we can say exponential of y. The value of e is approximately equal to 2.71828…..

Syntax : math.exp(y)

Parameters :
y [Required] – It is any valid python number either positive or negative.
Note that if y has value other than number then its return error.

Returns: Returns floating point number by calculating e^y.

Code # 1:

 # Python3 code to demonstrate  # the working of exp()  import math     # initializing the value  test_int = 4 test_neg_int = -3 test_float = 0.00    # checking exp() values  # with different numbers print (math.exp(test_int)) print (math.exp(test_neg_int)) print (math.exp(test_float))

Output:

54.598150033144236
0.049787068367863944
1.0

Code #2:

 # Python3 code to demonstrate  # the working of exp()  import math     # checking exp() values  # with inbuilt numbers print (math.exp(math.pi)) print (math.exp(math.e))

Output:

23.140692632779267
15.154262241479262

Code #3: TypeError

 # Python3 code to demonstrate  # the working of exp()  import math     # checking for string print (math.exp("25"))

Output:

Traceback (most recent call last):
File "/home/c7ae4f1bef0ed8c7756b3f55e7d2ce81.py", line 6, in
print (math.exp("25"))
TypeError: a float is required

My Personal Notes arrow_drop_up

Check out this Author's contributed articles.

If you like GeeksforGeeks and would like to contribute, you can also write an article using contribute.geeksforgeeks.org or mail your article to contribute@geeksforgeeks.org. See your article appearing on the GeeksforGeeks main page and help other Geeks.

Please Improve this article if you find anything incorrect by clicking on the "Improve Article" button below.

Article Tags :

Be the First to upvote.

Please write to us at contribute@geeksforgeeks.org to report any issue with the above content.