function _rangeInc(start, end, step) {
    var array = [];
    var x = start;

    if (step > 0) {
      while (smallerEq(x, end)) {
        array.push(x);
        x += step;
      }
    } else if (step < 0) {
      while (largerEq(x, end)) {
        array.push(x);
        x += step;
      }
    }

    return array;
  }
Create a range with numbers. End is included
@param {number} start
@param {number} end
@param {number} step
@returns {Array} range
@private