Python Coding Challenge - Question with Answer (ID -091225)

 

Step-by-Step Execution

✅ Initial Values:

clcoding = [1, 2, 3, 4]
total = 0

---

1st Iteration

x = 1 

total = 0 + 1 = 1

          clcoding[0] = 1

 ✅ (no visible change)

clcoding = [1, 2, 3, 4]

---

2nd Iteration

x = 2 

total = 1 + 2 = 3
clcoding[0] = 3 ✅

clcoding = [3, 2, 3, 4]

---

3rd Iteration

x = 3

total = 3 + 3 = 6

clcoding[0] = 6 ✅

clcoding = [6, 2, 3, 4]

---

4th Iteration

x = 4

total = 6 + 4 = 10

clcoding[0] = 10 ✅

clcoding = [10, 2, 3, 4]

---

✅ Final Output

[10, 2, 3, 4]

---

Why This Is Tricky

• ✅ x comes from the original iteration sequence

• ✅ But you are modifying the same list during iteration

• ✅ Only index 0 keeps changing

• ✅ The loop still reads values 1, 2, 3, 4 safely

---

Key Concept

 Changing list values during iteration is allowed
 But changing list size can cause unexpected behavior

Probability and Statistics using Python