None

Learn the 'no value' state with None.

The None type

None is a special type meaning "no value". It is like null in other languages. It marks that a variable has no value yet:

result = None
if result is None:
    print("Not computed yet")

None is NOT the same as False. None == False is false. Checking with is None is the right way.

None is a falsy value: if None: does not run. But None == False is still false. None means "no value", not "empty".

data = None
if not data:
    print("Empty or None")  # runs

None is different from an empty string (""). An empty string is text; None is nothing. Do not confuse them.

Assign None to result. Then check it with print(result is None).

Show example solution

result = None
print(result is None)

Assign None to result

result = ____
print(result is None)

Show answer

result = None
print(result is None)