This time we will have a few more exercises, they will help you to check if you understood everything discussed in this chapter. Use the web2py console for all exercises.

1. Create 3 variables, assign numeric values and strings; display them on the screen with and without the print statement.

2. What will be the output of the following Python statement:

   1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12.

   print 4 - 2 * 2 ? >>> print 9 / 3 ? >>> print 9 % 3 ? >>> print 10 % 3 ? >>> print 10 ** 4 ? >>> print 10 ** 2 * 2 ?

   Try to guess the result and type it in you shell to prove your guess.

3. Play around with integers and decimals. What happens if you divide an integer with a decimal? How do the results of exercise 2 change if you use decimals instead of integers.

4. Create a while loop that counts from 1 to 100 and prints out every number in a row.

5. Create a list with the first names of your family. What data type is best used for the names?

6. Print out every name in this list with a loop. Which loop type do you choose? Why?

7. Create a loop that checks if any of your family is called "John". Hint: You must loop through the list and check one element at a time.

8. Create a dictionary, with the names of your relatives as values and your relationship to them as keys; print out its content. Which Python objects can you use as keys and which as values?

9. You can also loop through a dictionary; actually you loop through the keys of a dictionary:

   1. 2.

   for key in dic: print key # prints out the key

   Create a for loop, where you print out all keys of the dictionary you creates in exercise 8 and its corresponding values. The output should look like this:

   1. 2.

   Mother: Penny Father: John

   The order is not important. This is a tough question; so take your time and don't give up.