+Sum of positive.js

/*Description:

You get an array of numbers, return the sum of all of the positives ones.

Example [1,-4,7,12] => 1 + 7 + 12 = 20

Note: array may be empty, in this case return 0.
*/
function positiveSum(arr) {
if(arr.length==0) return 0;
var sum=0;
    for(var i=0;i<arr.length;i++){
      if(arr[i]>0) sum = sum+arr[i];
      
    }
    return sum;
}