123405 Apr 2026

Want to see more algorithm breakdowns? Check out Algorithm blog post #3 on Medium for similar challenges!

Here is how you can tackle this "Topic 123405" challenge using Python. 1. The "String Conversion" Strategy

1×2×3×4×5=1201 cross 2 cross 3 cross 4 cross 5 equals 120 123405

The "Skip the Zero" Challenge: Mastering Digit Products in Python

The number is often used in coding challenges (like those on CheckiO) to teach basic algorithm logic, specifically how to calculate the product of digits while skipping zeros . Want to see more algorithm breakdowns

Here is a blog post tailored for a developer or student audience focusing on this specific challenge.

Do you have a more efficient way to solve this? Or perhaps you want to try it in another language like or C++ ? Let me know in the comments! Do you have a more efficient way to solve this

import math def checkio_pro(number): digits = [int(d) for d in str(number) if d != '0'] return math.prod(digits) Use code with caution. Copied to clipboard The Takeaway