Skip to content

README.md

Latest commit

 

History

History
60 lines (49 loc) · 2.44 KB

README.md

File metadata and controls

60 lines (49 loc) · 2.44 KB

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.
  • +++++++++++
  • int people = 3;
  • Variable name = people, data type = int, any integer e.g. 1, 2, 300, 400, etc.
  • float ticketPrice = 14.0f;
  • variable name = ticketPrice, data type = float, 32 bit precision numbers, up to 7 decimal points, e.g. 1.1234567
  • double itemPrice = 9.0;
  • variable name = itemPrice, data type = double, same as float, but 64 bit, up to 15 decimal points
  • boolean trueOrFalse = false;
  • variable name = true0rFalse, data type = boolean, 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!
  • String FirstName = 123;
  • this variable name is incorrect because it doesn't follow camel case, and the variable assignment is incorrect because it's an integer
  • double int = "Evan";
  • this variable name is incorrect because it's a keyword in Java, and the variable assigned is a string

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.

Format Specifiers

Part 4 - Submission

  • Commit your working code
  • Push it to your Remote/origin branch (i.e. GitHub)
  • Then issue a Pull request to the instructor branch
    • Make sure to save the Pull request URL and submit it for the lab.