Answers to the chapter 11 review questions.

1.  Describe the difference between a scalar variable and a data collection.

  A:  A scalar variable contains a single value.  A data collection contains
      multiple values.

2.  What is an array?

  A:  An array is a homogeneous data collection.  All of its elements are the
      same type.

3.  What is a class?

  A:  A class is a heterogeneous data collection.  Its members may be of 
      different types.  It also typically includes methods.

4.  How do you access an array element?

  A:  Access an array element with its index position inside of square 
      brackets:  monthlyPrecip[4].
