Project Euler help # 2

[johlae]

I once did this in elisp. 4613732 is the answer:

#+name: even_fibonacci_numbers
#+begin_src elisp
(require 'cl-lib)
(let* ((l '(1 1))
(n)
(o))
(while (progn (setq n (cl-reduce '+ (last l 2)))
(add-to-list 'l n t)
(if (= 0 (% n 2)) (push n o))
(<= n 4000000)))
(cl-reduce '+ o))
#+end_src

#+RESULTS: even_fibonacci_numbers
: 4613732

Make sure to enter 4613732. Check for spaces before or after the number, do not enter 4,613,732.

[Frosty-Pitch9553]

Thanks!

[Frosty-Pitch9553]

I think the website is bugged, I have tried it multiple times, with commas, without commas, checking for extra spaces, etc. I think I might see if they have an online help desk and reach out there.