Counting 0 to 9

In most programs that count upwards, the counting begins at 0.

Write a program counting_0_to_9.py that uses a counter variable (probably i) and a while loop to print out the numbers from 0 to 9. After that, print a message indicating how many times the loop ran. (Did the loop run nine times or ten?)

Extension

Modify your program so that a variable n is set at the beginning of the program:

n = 13     # example

Then modify the rest of your program so that it prints out the numbers 0 to n - 1, as well as a message indicating how many times the loop ran.