Used while loop to not exceed value of num.

Fibonacci Numbers

function sumFibs(num) {
    var prevNumber = 0;
    var currNumber = 1;
    var result = 0;
    
    while (currNumber <= num) {
        if (currNumber % 2 !== 0) {
            result += currNumber;
        }

        currNumber += prevNumber;
        prevNumber = currNumber - prevNumber;
    }

    return result;
}

// test here
sumFibs(4);