Python Coding Challange - Question with Answer (01290925)

Explanation:

Initialization:

arr = [1, 2, 3, 4] → we start with a list of 4 elements.

Slice assignment:

arr[1:3] → selects the elements from index 1 up to (but not including) index 3.

That is, [2, 3].

arr[1:3] = [8, 9] → replaces the selected slice [2, 3] with the new list [8, 9].

Step-by-step update:

Original array: [1, 2, 3, 4]

Replace arr[1:3] → [2, 3] becomes [8, 9]

New array: [1, 8, 9, 4]

Printing:

print(arr) → outputs the updated list: [1, 8, 9, 4].

 Final Output:

[1, 8, 9, 4]

Key Concept:

In Python, slice assignment lets you replace multiple elements in a list at once, and the new list does not need to be the same length as the slice.

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