1function roundIt(n, d = 0) {
2            var m = Math.pow(10, d); 
3            var n = +(d ? n * m : n).toFixed(8);
4            var i = Math.floor(n), 
5                diff = n - i; // getting the difference 
6            var e = 1e-8; // Rounding errors in var(diff) 
7            // Checking if the difference is less than or 
8            // greater than, based on that adding the 1 to it. 
9            var r = (diff > 0.5 - e && diff < 0.5 + e) ? 
10                ((i % 2 == 0) ? i : i + 1) : Math.round(n);
11            return d ? r / m : r; // if d != 0 then returning r/m else r 
12}