any() and all() functions in Python - Cheat Sheet & Quick Revision

Recall & Review

beginner

What does the any() function do in Python?

any() checks if at least one element in an iterable is True. It returns True if any element is true, otherwise False.

beginner

What does the all() function do in Python?

all() checks if every element in an iterable is True. It returns True only if all elements are true, otherwise False.

beginner

What will any([False, 0, '', None]) return?

It returns False because all elements are considered False in Python.

beginner

What will all([True, 1, 'hello', [1]]) return?

It returns True because all elements are considered True in Python.

beginner

How can any() and all() be useful in real life?

They help check conditions quickly, like if any sensor is active (any()) or if all tasks are done (all()), making decisions easier.

What does any([False, True, False]) return?

A Error

B False

C None

D True

Since there is at least one True value, any() returns True.

What does all([True, 1, 'yes']) return?

A True

B Depends on Python version

C False

D Error

All elements are truthy, so all() returns True.

What will all([True, False, True]) return?

A True

B Error

C False

D None

Because one element is False, all() returns False.

Which function returns True if any element is true?

A any()

B all()

C both all() and any()

D none

any() returns True if at least one element is true.

What does any([]) return?

A True

B False

C Error

D None

any() returns False for empty iterables.

Explain in your own words how any() works and give a simple example.

Think about checking if any light is on in a room.

Describe how all() differs from any() and when you might use it.

Imagine checking if everyone in a team finished their work.