Python Coding challenge - Day 649| What is the output of the following Python Code?

 

Code Explanation:

 1. Define the Generator Function

def countdown(n):

Defines a function named countdown that takes one argument n.

It's a generator function because it uses yield (coming up next).

2. Loop While n is Greater Than 0

    while n > 0:

Creates a loop that runs until n becomes 0 or negative.

Ensures that values are only yielded while n is positive.

3. Yield the Current Value of n

        yield n

Produces the current value of n.

The function pauses here and resumes from this point when next() is called again.

4. Decrease n by 1

        n -= 1

After yielding, n is reduced by 1 for the next iteration.

5. Create the Generator Object

gen = countdown(3)

Calls the countdown generator with n = 3.

This doesn't run the code yet, just returns a generator object stored in gen.

6. Loop to Get and Print 3 Values

for _ in range(3):

    print(next(gen))

Repeats 3 times (_ is a throwaway loop variable).

Each time:

Calls next(gen) to get the next value from the generator.

Prints that value.

Output of the Code

3

2

1

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