JavaScript Challenge #1 | Count Digits in a Number | JavaScript Logic from Simple to Advanced
In this video, we solve the problem “Count the number of digits in a number using pure JavaScript number logic no strings, no shortcuts.
We start with the simplest approach using loops and gradually move toward more advanced thinking, including edge cases like 0. As the complexity grows, we discuss why the logic needs to change and how professional developers think about such problems.
This video is part of a step-by-step series focused on building real problem-solving skills, not just writing code that works.
What you’ll learn in this video:
How to count digits using basic loop logic
Why 0 is a special case and how to handle it
How to deal with negative numbers correctly
How problem complexity increases with edge cases
A mathematical (optimized) approach and when to use it
This lesson is ideal for:
JavaScript beginners
Students preparing for interviews
Developers who want to strengthen their logical thinking
Watch till the end to understand how a “simple” problem becomes more complex when solved properly.