Fibronacci sequence spitting wrong number

Question

I have created a function that sumbs up all odd fibronacci numbers up to a given number, and for the most part it works all for except one number. For example sumFibs(10) should return 10 becuz all Fib #s <= 10 are 1,1,3 and 5.

If I do sumFibs(75024); I get 135721 instead of the expected value is 60696. For every other number it works perfectly and am scratching my head to solve it

function sumFibs(num) {

  let thunderAss = [];
  let currDmp = 0;
  let nxtRmp = 1;
  var pushNxt = 0;
  // push into array
  for (let x = 0; x < num; x++) {
    if (x <= 1) {
      console.log("lets go");
      thunderAss.push(1); // 2l almond milk
    } else {
      thunderAss.push(thunderAss[x - 1] + thunderAss[x - 2]);
      console.log(x, " x is factor");
    }
  }
  console.log(thunderAss);

  let cuntNuts = 0;
  for (let x = 0; x < num; x++) {
    if (cuntNuts < num) {
      if (thunderAss[x] % 2 == 0) {} else {
        cuntNuts += thunderAss[x];
      }
    } else {
      break;
    }
  }
  console.log("CN: ", cuntNuts);
  return cuntNuts;
}
sumFibs(75024); // 60696 but 135721
sumFibs(4);

Answer 1

You are adding the num first Fibonacci numbers instead of the Fibonacci numbers less than or equal to num.

In my solution here, I do the correct thing and get the correct answer:

function* fibonacci()
{
    let x = 0;
    let y = 1;

    while (true) {
        yield x;
        [x, y] = [y, x+y];
    }
}


function sum_odd_fibonacci(max)
{
    const fib_seq = fibonacci();

    let s = 0;
    let n;
    while ( (n=fib_seq.next().value) <= max) {
        if (n % 2 == 1) {
            s += n;
        }
    }

    return s;
}


console.log(sum_odd_fibonacci(75024));