Python Coding Challenge - Question with Answer (ID -150326)

 

    Explanation:

1️⃣ Creating the List

nums = [1,2,3]

Explanation

A list named nums is created.

It contains three elements.

nums → [1, 2, 3]

2️⃣ Creating the map Object

m = map(lambda x: x+10, nums)

Explanation

map() applies a function to each element of the list.

The function here is:

lambda x: x + 10

So the transformation would be:

1 → 11

2 → 12

3 → 13

⚠ Important:

map() does NOT calculate immediately.

It creates an iterator that produces values one by one when needed.

So internally:

m → iterator producing [11, 12, 13]

3️⃣ First next() Call

print(next(m))

Explanation

next() retrieves the next value from the iterator.

First element:

1 + 10 = 11

Output:

11

Now iterator position moves forward.

Remaining values:

[12, 13]

4️⃣ Second next() Call

print(next(m))

Explanation

Second element is processed:

2 + 10 = 12

Output:

12

Remaining values in iterator:

[13]

5️⃣ Modifying the Original List

nums.append(4)

Explanation

Now the list becomes:

nums → [1,2,3,4]

⚠ Important concept:

map() reads from the original list dynamically.

So the iterator will also see the new element 4.

Remaining iterator values now become:

3 + 10 = 13

4 + 10 = 14

Remaining:

[13, 14]

6️⃣ Calculating Sum of Remaining Iterator

print(sum(m))

Explanation

Remaining values are:

13 + 14

= 27

Output:

27

✅ Final Output

11

12

27

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