Hackerrank Control Flow and Looping 2

Question 1

What is the output of the following code?
```python
for i in range(10):
    if i % 2 == 0:
        continue
    if i > 6:
        break
    print(i)
```

Accepted Answer

1 3 5

Answer

The loop prints odd numbers (continue skips evens) and stops before printing 7 (break when i > 6).

Question 2

Which loop construct is most appropriate when you need to iterate over a list and also need the index of each element?

Accepted Answer

for i, item in enumerate(lst)

Answer

enumerate() returns both index and value, making it the Pythonic way to access both simultaneously.

Question 3

What does the `else` clause of a `for` loop execute?

Accepted Answer

Only when the loop completes without a break statement

Answer

The else block of a for loop runs when the loop finishes normally (without being terminated by break).

Question 4

What is the output of this code?
```python
x = 5
result = 'positive' if x > 0 else 'negative' if x < 0 else 'zero'
print(result)
```

Accepted Answer

positive

Answer

The chained ternary evaluates left-to-right: x > 0 is True so result is 'positive'.

Question 5

Which statement about `while True:` loops is correct?

Accepted Answer

They run indefinitely unless broken by a break or return

Answer

while True creates an infinite loop that only exits via break, return, or an exception.

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Hackerrank Control Flow and Looping 2