Python Coding challenge - Day 272| What is the output of the following Python Code?

 

Step-by-Step Explanation:

Line 1:

x = (1, 2, 3)

A tuple (1, 2, 3) is created and assigned to the variable x. Tuples are immutable in Python, meaning their elements cannot be changed after creation.

Line 2:

y = x

The variable y is assigned the same reference as x. At this point, both x and y point to the same memory location.

Line 3:

y += (4,)

The += operator here is used to concatenate the tuple (4,) to the tuple referenced by y.

However, tuples are immutable in Python. This means that you cannot directly modify the contents of a tuple using an operation like +=.

When you perform y += (4,), Python creates a new tuple by concatenating the original tuple (1, 2, 3) with (4,).

y is now pointing to this new tuple (1, 2, 3, 4).

Important Note: This does not modify x because tuples are immutable. x still points to the original tuple (1, 2, 3).

Line 4:

print(x)

This prints the original tuple x. Since x was never modified (because tuples are immutable), it still refers to the original value (1, 2, 3).

Output:

(1, 2, 3)