Python Boolean Operations - ashish9342/FreeCodeCamp GitHub Wiki
Python Docs - Boolean Operations
These are the Boolean operations, ordered by ascending priority:
| Operation | Result | Notes |
|---|---|---|
| x or y | if x is false, then y, else x | (1) |
| x and y | if x is false, then x, else y | (2) |
| not x | if x is false, then True, else False | (3) |
Notes:
- This is a short-circuit operator, so it only evaluates the second argument if the first one is False.
- This is a short-circuit operator, so it only evaluates the second argument if the first one is True.
- not has a lower priority than non-Boolean operators, so not a == b is interpreted as not (a == b), and a == not b is a syntax error.
>>> not True
False
>>> not False
True>>> True and False # Short-circuited at first argument.
False
>>> False and True # Second argument is evaluated.
False
>>> True and True # Second argument is evaluated.
True>>> True or False # Short-circuited at first argument.
True
>>> False or True # Second argument is evaluated.
True
>>> False or False # Second argument is evaluated.
False