How to test a variable is null in python

Question

val = "" 

del val 

if val is None: 

print("null")

I ran above code but got NameError: name 'val' is not defined.

How to decide whether a variable is null, and avoid NameError?

Answer 1

You can check if val is None by using the below mentioned piece of code:-

if val is None: 

pass 

To know more about this you can have a look at the following video tutorial:-