
Write declarations for storing the following quantities. Choose between integers and floating-point numbers. Declare constants when appropriate.
- a. The number of days per week
- b. The number of days until the end of the semester
- c. The number of centimeters in an inch
- d. The height of the tallest person in your class, in centimeters
a.

Explanation of Solution
Declaration for the first statement:
- The given statement is “The number of days per week”.
- Totally, there are seven days in a week and there is no change of days in a week.
- Hence, the number of days in a week is fixed forever.
- The declaration for storing the number of days in a week is as follows:
/* Declaration for storing the number of days in a week */
public static final int DAYS_PER_WEEK = 7;
b.

Explanation of Solution
Declaration for the second statement:
- The given statement is “The number of days until the end of the semester”.
- The number of days in a semester varies from time to time and the days may either increase or decrease based on the semester time-table.
- Hence, the number of days in a semester is an integer variable.
- The declaration for storing the number of days in a semester is as follows:
/* Declaration for storing the number of days in a semester */
public int daysInSemester;
c.

Explanation of Solution
Declaration for the third statement:
- The given statement is “The number of centimeters in an inch”.
- The number of centimeters in an inch is a fixed type of float value.
- The declaration for storing the number of centimeter in an inch is as follows:
/* Declaration for storing the number of centimeters in an inch */
public static final float CENTIMETERS_IN_INCH = 2.54;
d.

Explanation of Solution
Declaration for the fourth statement:
- The given statement is “The height of the tallest person in your class, in centimeters”.
- The height of the tallest person in a class is a float value since height contains decimal values.
- The height of a person varies over time.
- Hence, the height of a person is not fixed and it is float type value.
- The declaration for storing the height of the tallest person in a class is as follows:
/* Declaration for storing the height of the tallest person in a class*/
public float tallestHeight;
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