Anatomy of Hello-World

Discuss the ../../2019fall/./course-info.html (w/ particularly attention to the honor policy).
Some terms:
- Calling a function corresponds to asking a question (e.g. What's the square root of 25 or What's the area of a 20-inch pizza?).
- writing a function is writing down the instructions to answer that question, whenever it gets asked in the future.
At all times, we must be aware of which of these two activities we're doing. Note that sometimes in the process of writing one function, we call others! (For example, in the process of writing testPizzeria, we call pizzaArea.)
Anatomy of a program: When I look at the file from ../../2019fall/Labs/lab01a, which lines are the important ones? What are the terms we use to talk about the important bits? function name, parameter, parameter type, return type -- these comprise the function's signature; this is the most important part of each function because it's exactly the info people need, to call the function.
Syntax of method call: memorize it!
- In words: To call a function: methodName-openParen-arguments.
- Official syntax:
  method-call ::= _namemethod( expression, expression, … )
We've seen examples that return answers: Math.sqrt( 12+4 )
as well as examples which change some pixels on the screen, but don't return answers: System.out.println( 12+4 );
We can use the answer from one method as the argument to another (!): Math.sqrt( Math.sqrt( 12+4 ) )
System.out.println( Math.sqrt(12+4) );
Note that it does not make sense to write Math.sqrt( System.out.println( 12+4 ) );. Why not? (We'll talk more about this later.)
Use good spacing, indentation.

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