Unit #2-01

Learning Outcome

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

understand what a variable is and how to use one
- create an application that accepts input and saves it into a variable
understand what a top-down design is and how to create one

go over what a Top-Down Design is
- we use square line connectors and rectangular boxes
- arrows always point down
- normally left black & white
go over how to create one using draw.io
- once again, this is a Chrome extension
go over what a variable is
- we will always use this rule:
  - lowercase with words separated by underscores as necessary to improve readability
  - ex: area_of_rectangle, time_of_day, number_of_students
  - this "=" IS NOT an equal sign, it is an assignment statement

create a program that calculates the area and perimeter of a rectangle with dimensions entered by user
- come up with three (3) test case, BEFORE YOU WRITE THE CODE to ensure you know what the answer should be BEFORE you start coding
  - note, you can not use my test cases!
  - then check to ensure your answers are correct!
remember to create a new folder in Cloud9 (Unit2-02) and the GitHub repo first and then clone it into Cloud9
when done, add to your notebook
- include storyboard(s), top-down design, test case, screenshot, style check, code & GitHub link
read Top-Down Design, Computer Based Problem Solving
read Variables, Computer Based Problem Solving