Python Coding challenge - Day 595| What is the output of the following Python Code?

 

Code Explanation:

1. Generator Function Definition

def gen():

    for i in range(2):

        yield i

What this does:

This defines a generator function named gen().

Inside it, there’s a for loop: for i in range(2) → it will loop over 0 and 1.

The yield keyword is used instead of return.

Key Concept:

A generator function doesn't run immediately when called.

It returns a generator object, which can be iterated using next().

yield pauses the function and remembers its state, so it can resume from where it left off.

2. Create Generator Object

g = gen()

What this does:

Calls the gen() function.

Instead of executing the function body right away, Python returns a generator object.

This object can be used to get values from the generator one at a time using next().

g is now a generator that will yield 0, then 1, then stop.

3. First next() Call

print(next(g))

What this does:

Starts executing the gen() generator.

Enters the loop: i = 0.

Hits yield i, which yields 0.

The function is paused right after yielding 0.

Output:

0

4. Second next() Call

print(next(g))

What this does:

Resumes the generator from where it left off.

Next loop iteration: i = 1.

Yields 1.

Pauses again after yielding.

Output:

1

Final Output

0

1

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