Javascript Number times(func)

var i = 0;/* w w  w . ja  va2 s  .c o  m*/

Number.prototype.times = function(func) {
  let n = Math.round(this);  
  if (n <= 0) return null;
  
  func();
  return (n - 1).times(func);
}

console.log(i);

Number.prototype.times = function (func) {
 var i;/*from   w w  w. j  a v  a2  s.c o  m*/
 for (i = 0; i < this; i += 1) {
  func();
 }
};

function random(min, max) {
    var floor = +min,
        ceil = +max;
    if ((floor % 1 !== 0) || (ceil % 1 !== 0)) {
        return Math.random() * (ceil - floor) + floor;
    }
    return Math.floor(Math.random() * (ceil - floor + 1)) + floor;
};