Python · Types and built-ins

Truthiness

Empty containers, zero, None and empty strings are false; most other values are true.

pythonRunnable example python course

Syntax

if value:

Example

Open in the lab

for value in [0, 1, "", "x", [], [0]]:
    print(repr(value), bool(value))

Reference pages are the quick answer. The course explains the why, shows the full example and ends with a challenge.