Python Coding Challenge - Question with Answer (ID -190326)

 

Explanation:

1. List Initialization

lst = [1, 2, 3, 4]

A list named lst is created.

It contains 4 elements: 1, 2, 3, 4.

🔹 2. For Loop Setup

for i in range(len(lst)):

len(lst) gives the length of the list → 4.

range(4) generates numbers: 0, 1, 2, 3.

The loop runs 4 times with i as the index:

First iteration → i = 0

Second → i = 1

Third → i = 2

Fourth → i = 3

🔹 3. Updating List Elements

lst[i] += i

This means:

👉 lst[i] = lst[i] + i

Let’s see each iteration:

Iteration i Original lst[i] Calculation New Value

1 0 1 1 + 0 1

2 1 2 2 + 1 3

3 2 3 3 + 2 5

4 3 4 4 + 3 7

🔹 4. Final List After Loop

After all updates:

lst = [1, 3, 5, 7]

🔹 5. Printing the Result

print(lst)

Outputs:

[1, 3, 5, 7]

✅ Final Output

[1, 3, 5, 7]

Book: Python for Cybersecurity