1.     1 + 2
2.     1.5 + 2.5
3.     'apple' + 'ball'
4.     'apple' + 2
5.     1 + 'wall'
6.     "Python" + ' is ' + "fun"

Based on the results above and any additional experiments that you wish to conduct, briefly describe your conclusions about how the + operator works for different types of data.

     apple = 5
     ball = 7

     'apple' + 'ball'
     apple + ball

1.     20 * 6
2.     'oh' * 2
3.     'oh' * 7
4.     "wow!" * 10
5.     'apple' * 'ball'
6.     5 * 'oh'

Based on the results above and any additional experiments that you wish to conduct, briefly describe your conclusions about how the * operator works for different types of data.

1.     cmp(5, 10)
2.     cmp(10, 5)
3.     cmp(5, 5)
4.     cmp(10, 10)
5.     cmp('apple', 'ball')
6.     cmp('ball', 'apple')
7.     cmp('apple', 'apple')
8.     cmp('ball', 'ball')

Based on the results above and any additional experiments that you wish to conduct, briefly describe your conclusions about the meanings of the values that this function returns.

What results do you obtain when you evaluate each of the following expressions in the interpreter? Include the results in your answer to this problem.

1.     range(2)
2.     range(8)
3.     range(6, 12)
4.     range(20, 25)
5.     range(0, 24, 3)
6.     range(0, 24, 4)
7.     range(10, 5, -1)
8.     range(30, 15, -3)

Based on the results above and any additional experiments that you wish to conduct, briefly describe your conclusions about how the range() function works when given one, two, and three arguments.

1.     for i in [0, 1, 2, 3, 4, 5, 6, 7, 8, 9]:
           print i 
   

2.     for i in [20, 18, 16, 14, 12, 10]:
           print i
   

    start = 1000
    change = 0

    for i in range(2):
        amount = input("Enter a deposit or withdrawal amount: ")
	change = change + amount

    perc_change = 100 * change / start
    print "The percent change in the account is", perc_change

1. (3 pts) There is a bug in the current version of the program. To see this, try running it several times using the Run->Run Module menu option. Although it does work for some combinations of transactions (e.g., 100 and 200, for which it reports a 30 percent change), it does not work for others (e.g., 100 and 55, for which it reports a 15 percent change, when the precise change is 15.5 percent). Fix this bug by making a single change to the code that we have given you.

2. (2 pts) Change the program so that it handles 4 transactions, rather than just 2.

3. (2 pts) Change the program so that it prints the word "percent" and a period after the percent-change value.

4. (3 pts) Change the program so that it prints the new account balance, in addition to the percent change. The new balance should go on a separate line before the percent change, as follows:

       The new account balance is 1200 dollars.
       The percent change in the account is 20 percent.
   

5. (2 pts) Change the program so that it prints a blank line between the last value entered by the user and the line that reports the result of the computations.

Make sure that all of your changes to the module are saved before you move onto the next problem.

You should make these changes in a separate file. To do so, save a copy of your accountCalculator.py file from the previous problem by using the File->Save As menu option in IDLE. Give the copy the name accountCalculator2.py. Make sure to include the .py extension at the end of the file name.

1. Begin by adding an input statement that asks the user to enter the starting balance and assigns the user's input to the variable start. Use an appropriate prompt, making sure that there is a space at the end of the prompt. This input statement should replace the existing assignment statement for the variable start.

2. Next add an input statement that asks the user to enter the number of transactions and assigns the user's input to a variable. Use an appropriate prompt with a space at the end of the prompt, and use a descriptive variable name that makes it clear what the variable represents.

3. Next, make whatever changes are needed so that the program reads in the specified number of transactions.

4. Finally, modify the program so that the prompts that ask the user to enter a transaction include the number of the transaction that should be entered next. Here's what the prompts should look like:

       Enter transaction 1 100
       Enter transaction 2 200
       ...
   

   Note that the prompts should remain on the same line as the user's inputs (which are shown in bold above). In addition, make sure that the first transaction has the number 1, the second transaction has the number 2, and so on. Hint: Instead of specifying the prompt as part of the input statement, use a separate print statement that comes before the input statement, and change the input statement so that it does not take an argument, as follows:

       amount = input()