Python Tutorials · Python None

Python None

Learn all about Python None in this comprehensive tutorial.

5 min read beginner

None is a special constant in Python that represents the absence of a value.

Its data type is NoneType, and None is the only instance of a NoneType object.

NoneType

Variables can be assigned None to indicate "no value" or "not set".

python

val_1 = None
print(val_1)

Use type() to see the type of a None value.

python

val_1 = None
print(type(val_1))

To compare a value to None, use the identity operator is or is not

python

result = None
if result is None:
  print("No result yet")
else:
  print("Result is ready")

python

result = None
if result is not None:
  print("Result is ready")
else:
  print("No result yet")

None evaluates to False in a boolean context.

python

print(bool(None))

Functions that do not explicitly return a value return None by default.

python

def myfunc():
  val_1 = 5

val_1 = myfunc()
print(val_1)

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