This content originally appeared on DEV Community and was authored by DPC
Daily JavaScript Challenge: Sum All Even Fibonacci Numbers
Hey fellow developers! đź‘‹ Welcome to today's JavaScript coding challenge. Let's keep those programming skills sharp!
The Challenge
Difficulty: Medium
Topic: Fibonacci Series
Description
Your task is to write a function that returns the sum of all even Fibonacci numbers up to a given number, inclusive. Fibonacci numbers are Fibonacci(n) = Fibonacci(n-1) + Fibonacci(n-2) with starting values Fibonacci(0) = 0 and Fibonacci(1) = 1. If there are no even numbers in the series up to the given number, return 0.
Ready to Begin?
- Fork this challenge
- Write your solution
- Test it against the provided test cases
- Share your approach in the comments below!
Want to Learn More?
Check out the documentation about this topic here: https://en.wikipedia.org/wiki/Fibonacci_number
Join the Discussion!
- How did you approach this problem?
- Did you find any interesting edge cases?
- What was your biggest learning from this challenge?
Let's learn together! Drop your thoughts and questions in the comments below. 👇
This is part of our Daily JavaScript Challenge series. Follow me for daily programming challenges and let's grow together! 🚀
javascript #programming #coding #dailycodingchallenge #webdev
This content originally appeared on DEV Community and was authored by DPC
DPC | Sciencx (2025-08-21T00:00:35+00:00) Daily JavaScript Challenge #JS-258: Sum All Even Fibonacci Numbers. Retrieved from https://www.scien.cx/2025/08/21/daily-javascript-challenge-js-258-sum-all-even-fibonacci-numbers/
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