not Boolean NOT
Last updated: 2026-09-22
not Boolean NOT
not returns the boolean negation (True / False).
| Category | Operators |
|---|---|
| Kind | Operator |
| Python Version | all |
📝 Syntax
not a▶ Example
Edit the code, press Run, and see the result in the output panel:
Output：
True
False
True💡 Related Cases
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❓ FAQ
QWhat type does not return?
AAlways a bool (`True` or `False`). That is its biggest difference from `and`/`or`: `not 'x'` returns `False`, not `'x'`.
QCan not x and x != y be used interchangeably?
ANo. `not x` negates the truthiness of `x` itself (`x` can be any object); `x != y` compares two values. Only `not (x == y)` is equivalent to `x != y`.
QWhat is the precedence of not?
A`not` is lower than comparison operators: `not x == y` is equivalent to `not (x == y)`; it is higher than `and`/`or`. The overall order is comparison > `not` > `and` > `or`.
