Python Booleans

Satellite · Data Types

Python Booleans

Booleans drive control flow. Learn when values evaluate to True/False and how to avoid subtle bugs.

Check truthinessUse logical operators

Truthiness

Falsy values:

• False
• None
• 0, 0.0
• Empty sequences: "", [], (), {}, set()

Everything else is truthy.

Logical operators

Operator	Behavior
and	Returns first falsy operand, else last operand
or	Returns first truthy operand
not	Negates truthiness

Example:

user = cached_user or fetch_user()
if not user.active:
    disable(user)

Next up in your learning path

Control flow

Use booleans inside if/loop conditions.

Companion

Comparison operators

Produce booleans using comparisons.

Reference

Truthiness checks

Use explicit comparisons when clarity matters.

Tip