Explanation:
🔹 Step 1: Create List
x = [1,2,3,4]
Initial list:
[1,2,3,4]
Index positions:
0 → 1
1 → 2
2 → 3
3 → 4
🔹 Step 2: Start Loop
for i in x:
Python starts iterating over the list.
Current list:
[1,2,3,4]
🔹 Step 3: First Iteration
i = 1
Check:
1 % 2
Result:
1
Which is truthy.
So:
x.remove(1)
List becomes:
[2,3,4]
🔹 Step 4: Loop Moves to Next Index
⚠️ Here comes the trap 😈
After removing 1, everything shifts left:
0 → 2
1 → 3
2 → 4
But the loop's internal index moves forward to the next position.
So Python now goes to:
index 1
Value at index 1:
3
👉 2 gets skipped completely!
🔹 Step 5: Second Iteration
i = 3
Check:
3 % 2
Result:
1
Truthy.
Execute:
x.remove(3)
List becomes:
[2,4]
🔹 Step 6: Loop Ends
Current list:
[2,4]
No more elements to iterate.
🔹 Step 7: Print Result
print(x)
Output:
[2,4]
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