Python Coding challenge - Day 1140| What is the output of the following Python Code?

 

 Code Explanation:

🔹 1. Function Definition

def gen():

✅ Explanation:

A function gen is defined.

Because it uses yield, it becomes a generator function (not a normal function).

🔹 2. First yield

yield 1

✅ Explanation:

yield produces a value without ending the function.

It pauses execution and remembers its state.

🔹 3. Second yield

yield 2

✅ Explanation:

When resumed, the function continues from where it stopped.

Now it yields 2.

🔹 4. Third yield

yield 3

✅ Explanation:

On next resume, it yields 3.

After this, the generator is exhausted.

🔹 5. Creating Generator Object

g = gen()

✅ Explanation:

Calling gen() does NOT execute the function immediately.

It returns a generator object.

Execution starts only when next() is called.

🔹 6. First next() Call

print(next(g))

🔍 What happens:

Starts execution of gen()

Runs until first yield

✔️ Output:

1

🔹 7. Second next() Call

print(next(g))

🔍 What happens:

Resumes from previous pause

Continues to second yield

✔️ Output:

2

🎯 Final Output

1

2

Book: 900 Days Python Coding Challenges with Explanation