Java-Lab-002

Variables, Types and Operators

Be able to explain what variables are. Understand variable types, allowed names, and valid values. Know how to create and use string, integer, floating-point, and boolean variables.

Part 1 - PricelessScript.java - MasterCard YouTube Ad

The lab template contains a program that prints the following:

2 tickets: $28.00
2 hotdogs, 2 popcorn, 2 sodas: $18.00
1 autographed baseball $45.00
real conversation with 11 year old son: priceless
true

Ignore the code that you don't fully recognize and concentrate on changing the variables to alter the MasterCard Priceless script to say:

3 tickets: $42.00
3 hotdogs, 3 popcorn, 3 sodas: $27.00
2 autographed baseball $90.00
watching the Giants win: priceless
false

Part 2 - Interpretation

Take note of the various variables and their data types. Write a brief summary in this section of the README.md file listing the:

• Variable name
• Its data type
• and example values you can assign them.

1. Character:

   1. Stores a single character of text
   2. ex: e, 2, g, and (.

2. String:

   1. Stores multiple characters of text.
   2. ex: "Hi, how are you doing?", or "1000 - 1200 = (-)200".

3. Integer:

   1. Stores an integer that can be used to perform calculations
   2. ex: 5, 20, 2000000000, or -50

4. Float/Double:

   1. Stores decimal numbers. Float uses 32 bit components and double uses 64 bit components
   2. ex: 11.25, 8.0, 0.5061, or 0.001

5. Boolean:

   1. Stores the value of true or false.
   2. ex: True, or False

Next give TWO example variable names and TWO example variable assignments that are WRONG and explain why.

• Hint: your IDE can help you discover these!

1. char firstInitial = "H"; //"H" is a string value becuase it is contained by quotation marks, not apostrophes.
2. int balance = 500.0; //500.0 is a double, not an integer value.

Part 3 - Bonus: Play around with Java String Format Specifiers.

Pick several of the Java format specifiers below and define variables of the correct type utilize sout and String.format to view the resulting formats.

Part 4 - Submission

• Just as you did last week (Reference the Lab video in your Week 1 module), create a Spring2023 feature branch of your code
• Commit your working code to your local copy
• Push it to your Remote/origin branch (i.e. GitHub: Spring2023 -> origin/Spring2023)
• Then issue a Pull request to my instructor branch
  • Make sure to save the Pull request URL and submit it for the lab.