项目Euler JavaScript＃2无法弄清楚如何打印全部内容

Question

If I put this in to codeacademy labs, it returns the sum. But I can't figure out why it won't print/log/return the total when I tell it to.

var a = 0,
 b = 1,
 f = 1,
 fibNums = [];
 sum = 0;


while (f < 4000000) {
    f = a + b;
    if ( f > 4000000 ) {
        break;
    } else {
        a = b;
        b = f;
        fibNums.push(f);
        i ++;
    }
}

for (i =0; i < fibNums.length; i++) {
    if (fibNums % 2 === 0) {
        sum += fibNums(i);
    }
}

Answer 1

You have several errors in your code.

You need to access array elements using [] and not () . In your case sum is always 0 since you are accessing array in wrong way.

Here is the working code:

 var a = 0, b = 1, f = 1, fibNums = []; sum = 0; while (f < 4000000) { f = a + b; if (f > 4000000) { break; } else { a = b; b = f; fibNums.push(f); } } for (var i = 0; i < fibNums.length; i++) { if (fibNums[i] % 2 == 0) { // access array elements using [] notation sum += fibNums[i]; // access array using [] } } console.log(sum); // Log the sum console.log(fibNums); //log the fibNums array