Python Coding Challenge - Question with Answer (ID -140626)

 

Explanation:

🔹 Line 1: Create a List

x = [1, 2, 3]

A list is created and assigned to x.

Current value:

x = [1, 2, 3]

🔹 Line 2: Start Pattern Matching

match x:

Python's match-case statement (introduced in Python 3.10) is similar to a switch statement, but much more powerful.

Python now tries to match:

[1, 2, 3]

against the available patterns.

🔹 Line 3: Check the Pattern

case [1, *rest]:

This pattern means:

First element must be 1

and

Store all remaining elements in rest

Think of it like:

[1, anything, anything, ...]

🔹 Line 4: Match the First Element

List:

[1, 2, 3]

Pattern:

[1, *rest]

Python checks:

1 == 1

✅ Match successful.

🔹 Line 5: Capture Remaining Elements

After matching the first element:

1

remaining values are:

[2, 3]

These values are collected into:

rest

So:

rest = [2, 3]

🔹 Line 6: Execute Print Statement

print(rest)

becomes:

print([2, 3])

Output:

[2, 3]