Python Coding challenge - Day 725| What is the output of the following Python Code?

 

Code Explanation:

1) def gen():

Defines a generator function named gen.

Unlike a normal function, it uses yield, meaning calling it will return a generator object that produces values one at a time.

2) for i in range(3):

Loop from i = 0 to i = 2 (range(3) gives [0, 1, 2]).

3) yield i * i

Each loop iteration yields the square of i instead of returning it once.

So calling gen() produces values: 0, 1, 4.

4) g = gen()

Calls the generator function.

No code inside gen runs yet — instead, we get a generator object assigned to g.

5) print(next(g))

next(g) starts the generator and runs until the first yield.

For i = 0, it yields 0 * 0 = 0.

Prints:

0

6) print(sum(g))

Now the generator g continues from where it left off.

Remaining values to yield:

i = 1 → 1 * 1 = 1

i = 2 → 2 * 2 = 4

So sum(g) = 1 + 4 = 5.

Prints:

5

Final Output

0

5

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