Unit3-02: If..Then & Boolean Expressions

Learning Outcome

At the end of this lesson, you will be able to:

• understand boolean expressions

• create if..then statements

Quiz Questions

With a paper and pencil, complete the following questions:

1. Declare a variable in Python AND C++ called "subtotal" that holds the value 12.99.

2. Cast the above variable to an integer called "subtotal_int" in Python AND "subtotalInt" in C++.

3. Declare a constant string in Python AND  C++ for the Immaculata slogan "Go Saints!".

4. Create the top-down design for a program that asks the user for the cost of an item and tells them the tax in Alberta, which has GST of 5%.

5. Create 1 test case for the above program.

Review

• tax program

  • when displaying money, always:

    • use $, even in your test cases

    • round to 2 decimal places, even in your test cases

• make sure to write specific comments 

  • example of a bad comment:

# input

# process

# output

• • example of a good comment:

# get the subtotal 

# calculate the tax and total

# display the tax and total 

• make sure to have a line break BEFORE the comment for readability

# get user input

subtotal = float(input("Enter subtotal: $"))

# calculate the tax amount and the total with tax

tax = subtotal * constants.TAX_RATE_ONTARIO / 100

total = subtotal + tax

Activity

• in groups of 2, do the following on the board for today's daily assignment:

  • Top-Down Design

  • Flow Chart

  • Pseudocode

  • Test Cases

Daily Assignment

• complete the Daily Assignment section in Hãpara Workspace for this day

  • if Hãpara is not working, make a copy of this document

  • move it to your IMH-ICS folder for this course