Python Coding challenge - Day 1180| What is the output of the following Python Code?

 

Code Explanation:

🔹 1. Importing cycle

from itertools import cycle

✅ Explanation:

cycle() is imported from Python's itertools module.

cycle() creates an iterator that repeats elements forever.

Think of it as:

A → B → A → B → A → B → ...

It never stops automatically.

🔹 2. Creating a Cycle Object

c = cycle(["A", "B"])

✅ Explanation:

A cycle iterator is created.

Original list:

["A", "B"]

Internally:

A

↓

B

↓

A

↓

B

↓

A

↓

...

Current state:

c → cycle iterator

🔹 3. Starting the Loop

for _ in range(5):

✅ Explanation:

range(5) generates:

0, 1, 2, 3, 4

Total iterations:

5 times

_ means:

Loop variable is not needed

🔹 4. First Iteration

next(c)

✅ Explanation:

Python asks cycle for the next value.

Current sequence:

A → B → A → B ...

Returns:

A

Printed:

A

🔹 5. Second Iteration

next(c)

✅ Explanation:

Cycle moves to next element.

Returns:

B

Printed:

A B

🔹 6. Third Iteration

next(c)

✅ Explanation:

List finished:

[A, B]

Normally an iterator would stop.

But cycle() restarts automatically.

Returns:

A

Printed:

A B A

🔹 7. Fourth Iteration

next(c)

Returns:

B

Printed:

A B A B

🔹 8. Fifth Iteration

next(c)

Returns:

A

Printed:

A B A B A

🔹 9. Understanding end=" "

print(next(c), end=" ")

✅ Explanation:

Normally:

print("A")

print("B")

Output:

A

B

But:

print("A", end=" ")

print("B", end=" ")

Output:

A B

Everything prints on the same line.

🎯 Final Output

A B A B A

Book: 100 Python Programs for Beginner with explanation