Python · Theory

bool()

Theory

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bool() is built into Python. You do not import it. Freshers only need one honest call and the printed result — not a long definition.

bool() — output — False then True. 0 is falsy; non-empty string is true.

Wrong type often raises TypeError. Empty values matter for bool/all/any. Don’t mix bool up with a similar name (sorted vs sort, int vs float).

Exam tip

Call bool() once and say what prints.

# bool()
print(bool(0))
print(bool("Asha"))

bool() — output: False then True. 0 is falsy; non-empty string is true.