Python Coding challenge - Day 805| What is the output of the following Python Code?

 

Code Explanation:

Import deque from collections

from collections import deque

deque is a special data structure from the collections module.

It stands for Double Ended Queue, meaning you can add or remove items from both left and right ends efficiently.

Create a deque

dq = deque([10, 20, 30])

A deque named dq is created with initial elements 10, 20, 30.

The structure now looks like: [10, 20, 30]

Append an Element to the Right Side

dq.append(40)

append(40) adds 40 to the right end of the deque.

Now the deque becomes: [10, 20, 30, 40]

Append an Element to the Left Side

dq.appendleft(5)

appendleft(5) adds 5 to the left end.

Now the deque becomes: [5, 10, 20, 30, 40]

Print First and Last Elements

print(dq[0], dq[-1])

dq[0] → first element = 5

dq[-1] → last element = 40

Output:

5 40

Final Output

5 40

500 Days Python Coding Challenges with Explanation