FREE PCEP Controlling loop execution Questions and Answers

Question 1

What will be the output of the following code snippet?

```python
for i in range(5):
    if i == 3:
        break
    print(i, end=' ')
```

Accepted Answer

0 1 2

Answer

The loop iterates through numbers from 0 to 4. The `print` statement executes for `i` values 0, 1, and 2. When `i` becomes 3, the `if` condition is met, and the `break` statement is executed, which terminates the loop immediately.

Question 2

What is the output of this code?

```python
for i in range(5):
    if i == 3:
        continue
    print(i, end=' ')
```

Accepted Answer

0 1 2 4

Answer

The loop iterates from 0 to 4. When `i` is 3, the `if` condition is true, and the `continue` statement is executed. This statement skips the rest of the current iteration (the `print` statement) and proceeds to the next iteration (when `i` is 4).

Question 3

What does the following code print?

```python
i = 0
while i < 5:
    print(i, end=' ')
    i += 1
    if i == 3:
        break
```

Accepted Answer

0 1 2

Answer

The `while` loop starts with `i = 0`. It prints 0, then increments `i` to 1. It prints 1, increments `i` to 2. It prints 2, increments `i` to 3. Now the condition `i == 3` is true, and the `break` statement terminates the loop.

Question 4

What is the output of this `while` loop?

```python
i = 0
while i < 5:
    i += 1
    if i == 3:
        continue
    print(i, end=' ')
```

Accepted Answer

1 2 4 5

Answer

Inside the loop, `i` is incremented first. When `i` becomes 3, the `continue` statement is executed, skipping the `print(i)` for that iteration. The loop continues, printing the values 1, 2, 4, and 5.

Question 5

What is the output of the following nested loop?

```python
for i in range(2):
    for j in range(2):
        if i == j:
            break
        print((i, j), end=' ')
```

Accepted Answer

(1, 0)

Answer

The `break` statement only affects the innermost loop it is in. When `i` is 0, the inner loop runs for `j=0`. The condition `i == j` is true, so `break` is executed, and nothing is printed. When `i` is 1, the inner loop runs for `j=0`. The condition is false, so `(1, 0)` is printed. Then `j` becomes 1, the condition `i == j` is true, and the inner loop breaks.

(PCEP) Certified Entry-Level Python Programmer Practice Test

(PCEP) Certified Entry-Level Python Programmer Practice Test

FREE PCEP Controlling loop execution Questions and Answers