Python Coding challenge - Day 1100| What is the output of the following Python Code?

 

Code Explanation:

1️⃣ Defining the Generator Function

def gen():

Explanation

A function named gen is defined.

Because it uses yield, it becomes a generator function.

Calling it does NOT run it immediately.

2️⃣ Yield Statement

yield 1

Explanation

yield pauses the function and returns a value.

It remembers its state for the next call.

First time execution → returns:

1

3️⃣ Return Statement (⚠️ Important)

return 2

Explanation

return ends the generator.

It does NOT behave like normal return in generators.

It raises a StopIteration exception.

The value 2 is stored inside that exception.

4️⃣ Creating Generator Object

g = gen()

Explanation

Creates a generator object.

Function is NOT executed yet.

5️⃣ First next() Call

print(next(g))

Explanation

Starts execution of generator.

Runs until first yield.

Returns:

1

6️⃣ Second next() Call

print(next(g))

Explanation

Continues execution after yield.

Hits return 2

Generator ends and raises:

StopIteration

⚠️ Value 2 is inside exception, not printed.

📤 Final Output

1

Traceback (most recent call last):

StopIteration

Book: 500 Days Python Coding Challenges with Explanation