JavaScript Challenge #2 | Sum of Digits of a Number | JavaScript Logic Explained Step by Step
In this video, we solve the problem “Sum of digits of a number” using pure JavaScript number logic without converting the number into a string.
We break the problem down step by step, starting with the basic idea of extracting digits using mathematical operations, and then build the complete solution using loops. This video focuses on understanding the logic, not memorizing code.
By the end of this lesson, you’ll clearly understand how numbers are processed digit by digit and how the same logic is reused in many advanced problems.
What you’ll learn in this video:
How to extract digits from a number using % and /
How loops work with numbers
Why converting numbers to strings is not real problem solving
How to handle edge cases like negative numbers
How this logic connects to problems like reverse number and palindrome
This video is part of a JavaScript problem-solving series where we build logic gradually from simple to complex.
This lesson is essential for anyone who wants to strengthen their programming fundamentals.