Sum All Odd Fibonacci Numbers, infinite loop?

Sum All Odd Fibonacci Numbers, infinite loop?


Tell us what’s happening:
stuck there, is it a infinite loop? But I have a condition to break the while loop so I don’t think it
is an infinite loop.

Your code so far

function sumFibs(num) {
  function fib(n){
      return 1;
    return fib(n-1) + fib(n-2);

  var total = 0;
  var i = 0;
  while (1 == 1) {
    if(fib(i) < num ){
       if(fib(i) % 2 !== 0){
        total += fib(i);
        i += 1;
  return total;


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Link to the challenge:


i doesn’t increment when fib(i) % 2 is even, so you get stuck in a loop.

You may also want to store fib(i) in a variable in the while loop, so that there’s only one fib computation per loop instead of three.

while (1 == 1) {
    if(fib(i) < num ){

Just because it’s going to bug me if I don’t say something, you really don’t want a while(true) (or a variant thereof).

Why not just make your loop while(fib(i) < num?

I’m not saying that this is necessarily the way you want to solve the problem, but I wanted to addresss the fundamental misunderstanding of how to use a while loop.


Thanks, that is good catch


Thank you so much for the suggestion