NumRange.js

nge.js
const NumRange = (function CreateRangeObject() {
  return {
    from: from
  }

  function from(num1) {
    
    var arr = [];
    return {
      to: to
    }
    function to(num2) {
      if (num1 < num2) {
        while (num1 <= num2) {
          arr.push(num1);
          num1++;
        }
      } else if (num1 > num2) {
        while (num1 >= num2) {
          arr.push(num1);
          num1--;
        }
      } else {
        return num1;
      }
    
      return arr;
    }
  }
  

})();