Prentice.Hall.Introduction.to.Java.Programming,.Brief.Version.9th.(2014).[sharethefiles.com]

3.9 Case Study: Computing Body Mass Index 97
What is 9 - 2? 5
Your answer is wrong
9 - 2 is 7
line# number1 number2 temp answer output
6 2
7 9
11 2
12 9
13 2
20 5
26 Your answer is wrong
9 – 2 should be 7
To swap two variables number1 and number2, a temporary variable temp (line 11) is used
to first hold the value in number1. The value in number2 is assigned to number1 (line 12),
and the value in temp is assigned to number2 (line 13).
3.15 Which of the following is a possible output from invoking Math.random()?
323.4, 0.5, 34, 1.0, 0.0, 0.234
3.16 a. How do you generate a random integer i such that 0 … i 6 20?
b. How do you generate a random integer i such that 10 … i 6 20?
c. How do you generate a random integer i such that 10 … i … 50?
3.9 Case Study: Computing Body Mass Index
You can use nested if statements to write a program that interprets body mass index.
Body Mass Index (BMI) is a measure of health based on height and weight. It can be calculated
by taking your weight in kilograms and dividing it by the square of your height in
meters. The interpretation of BMI for people 20 years or older is as follows:
✓Point✓ Check
Key
Point
BMI
Interpretation
Below 18.5 Underweight
18.5–24.9 Normal
25.0–29.9 Overweight
Above 30.0 Obese
Write a program that prompts the user to enter a weight in pounds and height in inches and
displays the BMI. Note that one pound is 0.45359237 kilograms and one inch is 0.0254
meters. Listing 3.5 gives the program.