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Python None Keyword - GeeksforGeeks

Last Updated : 23 Jul, 2025

None is used to define a null value or Null object in Python. It is not the same as an empty string, a False, or a zero. It is a data type of the class NoneType object. 

Python None is the function returns when there are no return statements.

def check_return():
    pass
print(check_return())

Output:

None

None - None is an instance of the NoneType object type. And it is a particular variable that has no objective value. While new NoneType objects cannot be generated, None can be assigned to any variable.

Null - There is no null in Python, we can use None instead of using null values.

Note: Python null is refer to None which is instance of the NoneType object type

Example:

Here we will both Null and None and we get the related output for these two statements. Where one of the outputs is Null is not defined.

print(type(None))
print(type(Null))

Output:

<class 'NoneType'>
---------------------------------------------------------------------------
NameError                                 Traceback (most recent call last)
Input In [9], in <cell line: 2>()
     1 print(type(None))
----> 2 print(type(Null))
NameError: name 'Null' is not defined

Assigning a value of None to a variable is one way to reset it to its original, empty state.

Example 1:

We will check the type of None

Output:

<class 'NoneType'>

Example 2:

Declaring a variable as None.

var = None

# checking it's value
if var is None:
    print("var has a value of None")
else:
    print("var has a value")

Output:

var has a value of None

Note: If a function does not return anything, it returns None in Python.

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