Python Control Flow: Conditional Statements 3

Question 1

What is the output of:

x = None
if x:
    print('truthy')
else:
    print('falsy')

Accepted Answer

falsy

Answer

None is falsy in Python, so the else branch executes and prints 'falsy'.

Question 2

Which of the following correctly checks if a variable `n` is between 1 and 10 inclusive?

Accepted Answer

if 1 <= n <= 10:

Answer

Python supports chained comparisons like `1 <= n <= 10`, which is the most Pythonic way.

Question 3

What does `pass` do inside an `if` block?

Accepted Answer

Does nothing; acts as a placeholder

Answer

`pass` is a no-op statement used as a syntactic placeholder when a block is required but no action is needed.

Question 4

What is the output?

for i in range(3):
    if i == 1:
        pass
    else:
        print(i)

Accepted Answer

0 2

Answer

When i==1 the `pass` does nothing and no print occurs, so only 0 and 2 are printed.

Question 5

Which of the following correctly uses `not` in an if statement?

Accepted Answer

if not x == 5:

Answer

`not` is Python's logical negation operator and `not x == 5` is valid syntax.

Python Practice Test