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






                        filter_none









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







                        filter_none









Output:


False
False
True








    

        My Personal Notes
        arrow_drop_up
    

    

        
        

            
            
        

    


Recommended Posts:
AKASH GUPTA 6
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.