Loops tutorial:  https://docs.python.org/3/tutorial/controlflow.html
While Loops:  https://www.tutorialspoint.com/python/python_while_loop.htm

1) Make me a loop that counts 1..10 including the 1 and the 10.

2) Make me a loop that counts 30,27,24,21,18,15,12,9,6.

3) Make me loops that print the pairs of numbers (1,1) (1,2) (1,3) (2,1) (2,2) (2,3).

4) Make me loops than print the following triangle:
*
**
***
****
*****
******
*******    <- There are 7 stars here!

5) Make me an infinite loop.

6) Consider the following rules:
    if a is even, then a=a//2
    if a is odd, then a = 3*a+a//2
  Start with a=1
  Run the rules 20 times.
  The sequence of numbers is 1,3,10,5,17, ....

  What is the biggest a ever gets?

  Run it again, with 1,000 iterations.  Now what is the biggest?