Homework 4: CodingBat Conditional and By-Hand Tracing Practice

Due: Monday, February 17

This homework set has two components:

• CodingBat – where you will write a bit of code (see below) and it will be automatically assessed
• By-hand tacing, which you will turn in an on-paper version in class

CodingBat

You will want to make an account on CodingBat. Please use your Hendrix email as your account email. Please also keep up with your own password – there is no way for me to recover it for you!

Be sure to share your progress with me, by going to “prefs” and entering your instructor’s email address (yorgey@hendrix.edu) in the “Teacher Share” box.

You should complete at least seven of the following. Completing more than seven is highly recommended for additional practice:

• Cigar Party
• Date Fashion
• Or 3 5
• Squirrel Play
• Caught Speeding
• Sorta Sum
• Alarm Clock
• Love 6
• In 1 to 10
• Near 10

By-Hand Tracing

Turn in your by-hand tracing for each section of code shown below, using the format we learned in class. You are strongly encouraged to check your answers by typing the code into a Python interpreter (i.e. Kaggle). Your by-hand work should show the updating of values as necessary.

1.

x = 7
y = 2
x = y - 3
z = x + y ** 3

2.

a = 2
b = a + 4
a = a + 3

if a == a + 3:
  c = 7
  a = 1
else:
  c = a * b
  b = 10

Specifications

• To be considered complete you must finish at least 7 of the CodingBat exercises and all values in your tracing must match the correct final values.