In lab demonstration of tracing code here.

For the advanced students in class, a demo of the power of ifs, fors, and whiles is available in the form of a tic-tac-toe program.

**Write a while loop that prints the numbers between 1 ans 20
that are either divisible by 2 or by 3. Demo the code to me on your computer.**

Note: you can use the remainder operator (%) to find out if a number is divisible by another number.

Note 2: don't print a number twice if it's divisible by both 2 and 3.

Example: ```
>>> ================================ RESTART ================================
```

>>>

0

2

3

4

6

8

9

10

12

14

15

16

18

>>>