any() and all() functions in Python - Practice Problems & Coding Challenges

Challenge - 5 Problems

❓ Predict Output

intermediate

Output of any() with mixed booleans

What is the output of this Python code snippet?

Python

values = [False, False, True, False]
result = any(values)
print(result)

A False

B True

C None

D TypeError

💡 Hint

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

The list has one True value, so any() returns True.

❓ Predict Output

intermediate

Output of all() with empty iterable

What does this code print?

Python

result = all([])
print(result)

A True

B IndexError

C False

D None

💡 Hint

all() returns True for empty iterables.

By definition, all() returns True when given an empty iterable.

❓ Predict Output

advanced

any() with generator expression

What is the output of this code?

Python

nums = [0, 0, 0, 1]
result = any(x > 0 for x in nums)
print(result)

A 0

B False

C TypeError

D True

💡 Hint

any() checks if any element in the generator is True.

Since 1 > 0 is True, any() returns True.

❓ Predict Output

advanced

all() with mixed truthy and falsy values

What will this code print?

Python

values = [1, 'hello', [], True]
result = all(values)
print(result)

A False

B None

C TypeError

D True

💡 Hint

all() returns False if any element is falsy.

The empty list [] is falsy, so all() returns False.

🧠 Conceptual

expert

Behavior of any() and all() with short-circuit evaluation

Which statement about any() and all() is true?

A any() checks all elements even if a True is found; all() checks all elements even if a False is found.

B any() stops checking as soon as it finds a False value; all() stops as soon as it finds a True value.

C any() stops checking as soon as it finds a True value; all() stops as soon as it finds a False value.

D any() and all() always check every element regardless of values.

💡 Hint

Think about how these functions optimize checking.

any() returns True immediately when it finds a True; all() returns False immediately when it finds a False.