JavaScript quiz. Consider following code: <pre><code class="javasc

Consider following code:


function sum() {
    var sum = 0;
    for (var i = 0; i < arguments.length; i++) {
        sum += arguments[i];
    }
    return sum;
}
var a = sum(5, -5, false, '-5', 5);
console.log(a);

What will be printed to the console?

"-55"
"0-55"
"5-50-55"
undefined
0

Explanation

 0+5 = 5
5 + -5 = 0
0 + false = 0 // true converts in to 1 and false into 0.
0 + '-5' = '0-5' // number + string converts to string
'0-5' + '5' = '0-55'