Python Coding challenge - Day 769| What is the output of the following Python Code?

Code Explanation:

1. Importing the array module

import array

The array module provides an array data structure which is more memory-efficient than Python’s built-in lists.

Here, we’ll use it to store integers compactly.

2. Creating an integer array

arr = array.array('i', [1, 2, 3])

array.array('i', [...]) creates an array of integers ('i' = type code for signed integers).

The initial array is:

arr = [1, 2, 3]

3. Appending an element

arr.append(4)

.append(4) adds 4 at the end of the array.

Now array becomes:

[1, 2, 3, 4]

4. Removing an element

arr.remove(2)

.remove(2) removes the first occurrence of 2 from the array.

Now array becomes:

[1, 3, 4]

5. Printing values

print(len(arr), arr[1], arr[-1])

len(arr) → gives number of elements → 3.

arr[1] → second element (indexing starts at 0) → 3.

arr[-1] → last element → 4.

Final Output:

3 3 4

500 Days Python Coding Challenges with Explanation