Build an Odd Fibonacci Sum Calculator - Build an Odd Fibonacci Sum Calculator

JavaScript
1

Tell us what’s happening:

i’m off by one in all my tests, and am not sure I understand the logic of the challenge. In order to avoid a spoiler, i’ve deleted my code, but can share if needed.

I could really just use an explanation of how the test sumFibs(4) should produce a result of 5 rather than 4. I may misunderstand Fibonacci numbers, but thought this would be

0+1 = 1. This is an odd number, so current sum is 1

1+1 = 2. This is even, so do nothing with the sum.

1+2 = 3. Current sum is incremented by 3, for a total of 4.

2+3 = 5. This is greater than the input number (4), so stop the function, and don’t change the sum.

Challenge Information:

Build an Odd Fibonacci Sum Calculator - Build an Odd Fibonacci Sum Calculator

2

the sum of all odd Fibonacci numbers that are less than or equal to the given number.

The ‘or equal’ is the most common oops I’ve seen with this challenge

3

I’m not sure i follow.

Are the Fibonacci numbers not 1 , 2, 3, 5, 8 […]. And therefore the odd ones that are less than or equal to 4 are 1 and 3, which adds to 4.

4

All I can do is guess without your code, unfortunately.

The Fibonacci numbers are 0, 1, 1, 2, 3, 5, 8, …

6

Thanks - this makes sense now. i’m skipping the 0 and 1 as being part of the series.

1 Like
7

It looks like you have an ‘off by one’ in your sum because you missed the first 1 in the sequence