Multiples of 3 and 5--project Euler 1

If we list all the natural numbers below is 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.

function Demo1 () {var multiplesarray = []; for (var i = 0; i<, i++) {if (i%5 = = 0 | | i%3 = = 0) {Multiplesarray.push (i);}} var Sumarray = 0;for (var j = 0; j<multiplesarray.length; j + +) {  Sumarray + = Multiplesarray[j];} return Sumarray;}

In fact, it is relatively simple, the above is to put all the numbers in an array to calculate the length of what other calculations more convenient, if you want to simple, use the following:

function Demo1 () {var sumarray = 0;for (var i = 0; i<; i++) {if (i%5 = = 0 | | i%3 = = 0) {Sumarray + = i;}} return Sumarray;}

The result is not written, run the code will know the result.

Multiples of 3 and 5--project Euler 1