Python math library | isnan() method

Python has math library and has many functions regarding it. One such function is isnan(). This method is used to check whether a given parameter is a valid number or not.

Syntax : math.isnan(x)

Parameters :
x [Required] : It is any valid python data type or any number.



Returns: Return type is boolean.
-> Returns False if the given parameter is any number(positive or negative)
-> Returns True if given parameter is NaN (Not a Number).

Code #1:

filter_none

edit
close

play_arrow

link
brightness_4
code

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

chevron_right


Output:

False
False
False

 
Code #2:

filter_none

edit
close

play_arrow

link
brightness_4
code

# Python3 code to demonstrate 
# the working of isnan() 
import math 
  
# checking isnan() values 
# with inbuilt numbers
print (math.isnan(math.pi))
print (math.isnan(math.e))
  
  
# checking for NaN value
print (math.isnan(float('nan')))

chevron_right


Output:

False
False
True


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.