slopeofhope81

Do you know that the sort method does not work so well on integers in an array since it is used for strings! 
That is something I found out today so then how to use a sort method on an array that has integers? Simply add a 
custom function to a sort method as an argument like below!
var arr = [1,100,4,30,5,80]
var compare = function(num1,num2){
    if (num1 < num2){
        return -1;
    }
    else if (num1 > num2){
        return 1;

slopeofhope81

/*If we list all the natural numbers below 10 that are multiples of 3 or 5,
we get 3, 5, 6 and 9. The sum of these multiples is 23. 
Find the sum of all the multiples of 3 or 5 below 1000.
 */

var multiples = function (n) {
    var sum = 0;
    for (var i = 1; i < n; i++) {
        if ((i % 3 == 0) || (i % 5 == 0)) {
            sum += i;