5.8 Shopping List

OBJECTIVES:

OBJECTIVES: By the end of this lesson, students will:

Demo. Click Add then item, to add to list. Click Delete, then item to cut from List.

STUDENT PAGE

Wrap Around Slides

Short Slides

- CSTA 2-AP-10: Use flowcharts and/or pseudocode to address complex problems as algorithms.
- CSTA 2-AP-11: Create clearly named variables that represent different data types and perform operations on their values.

Slides:

Show Top 5 lists. Ask class for tope 5 ideas?

Show the difference between Variables and Lists. Slides 7 -10

Preview today's project. Students should get their checkout working for the strawberry and then add extra items to their game.

Students should get their checkout working for one item: strawberry , then make it work for other items.

Other fun list projects: Garbage Sort. Chatbot Lists

Today you used abstraction. You created a high level plan that hid the complexity at a lower level.
Discuss the following questions:

1. Why is it a good idea to hide complexity at lower levels?
2. Multiplication is a math command, shown under operators. What other math commands can you find under operators?
3. Look at your coding blocks. How many variables did you use. Explain to a partner why you needed each of these variables in your code.

Abstraction hides details at a lower level to simplify complex systems.
It improves efficient and makes code easier to read. It also allows your code to work with a bigger range of scenarios.
E.g. The Madlibs project generated lots of sentence output, form one sentence frame and a variety of two word inputs.
Math operators: Addition, subtraction, divide, mod, round.
1. 1. - Mod returns the remainder - useful for telling if a number is odd or even.
    - Round: rounds to the nearest whole number.
    - Note: Square root can be changed to 14 other math functions including sin and cosine.
Students use four variables:

Number 1, Number 2: to hold random numbers, used in formulating game question and calculating.
CorrectAnswer: to store the correct math answer
Score: to store the players' score.