I can't believe we haven't seen Range yet !
Super easy ! Right ? And so useful and powerful.
Summary of the keywords:
to: When you do 0 to 3, you will get the numbers 0, 1, 2, 3. Notice that the end boundary is included.until: When you do 0 until 3, you will get the numbers 0, 1, 2. Notice that the end boundary is not included.by: When you do 0 to 11 by 3, you will get the numbers 0, 3, 6, 9. The default value is by 1.