function rangeOfNumbers(startNum, endNum) { return startNum === endNum ? [startNum] : [...rangeOfNumbers(startNum, endNum - 1), endNum ]; } code example

Example: use recursion to create a range of numbers

function rangeOfNumbers(startNum, endNum) {
  if (endNum - startNum === 0) {
    return [startNum];
  } else {
    var numbers = rangeOfNumbers(startNum, endNum - 1);
    numbers.push(endNum);
    return numbers;
  }
}