1. Multiple if-else boolean Data
Chapter 5
12/5/16 & 12/6/16
Imagine! Java: Programming Concepts in Context by Frank M. Carrano, (c) Pearson Education - Prentice Hall, 2010 1 1 1

2. Topics Multiple if-else(5.3) Boolean Data (5.6) 2 2 2
Imagine! Java: Programming Concepts in Context by Frank M. Carrano, (c) Pearson Education - Prentice Hall, 2010 2 2 2

3. Multiple Outcomes if-else can produce two possible outcomes.
One outcome for true
Another for false condition
Sometimes there can be several possible outcomes. 3

4. Example Course Description
Write a program to accept a course number then print the description for the course. 4

5. import java.util.Scanner;
//Outputs a course description for a course number
public class CourseDescription {
public static void main(String[] args) {
//Input the course number
Scanner scan = new Scanner(System.in);
System.out.print("Enter Course Number:");
String number = scan.next();
//Output correct description
if(number.equals("CS119"))
System.out.println("Intro to Java");
else if(number.equals("CS115"))
System.out.println("Intro to C");
else if(number.equals("CS111"))
System.out.println("Intro to Python");
else
System.out.println("Number not found.");
scan.close(); } 5

6. Movie Ticket Example
Move tickets sell at $6 for children under 14, $12 for adults, and $8 for seniors over 55.
Three outcomes
Can use an a series of if-statements in a chain to determine the price, given the age. 6

7. import java.util.Scanner;
import java.text.DecimalFormat;
//Determine movie price based on age
public class Movie{
public static void main(String []args){
//Input movie-goer's age
Scanner scan = new Scanner(System.in);
System.out.print("What is your age?");
int age = scan.nextInt();
//Decide price, based on age.**YOU WRITE THE IF-ELSE CHAIN
double price = 0.0;
DecimalFormat formatter = new DecimalFormat("$0.00");
System.out.println(formatter.format(price) + " please."); } 7

8. Participation
Write a program to accept an integer for placement in a hog show at the fair. Use a multiple if-else statement to output the ribbon color for the placement
“Blue”
“Red”
“White”
Any other number is “No ribbon” 8

9. Participation 2
Write a program to input sales. Using the follow chart, write an if-else chain that assigns .10, .15 or .20 to a commission rate depending on sales. Output the commission rate.
Sales
Commission Rate
Up to $10,000
10%
$10,000 to $15,000
15%
Over $15,000
20%

10. Boolean Variables 10

11. Boolean Variables boolean is a primitive type.
boolean variables can store either true or false.
Can use to flag condition.
Example:
boolean icyRoads = true;
if(icyRoads)
System.out.println(“Stay home.”);
else
System.out.println(“Drive on.”); 11

12. Boolean data field in Class
public class AutoRepair{
private String name;
private String make;
private String model;
private boolean done;
. . . 12

13. What is the value in y? int y, x = 5; boolean flag = true;
if (x > 10 || x < 2)
y = 1;
else if(flag)
y = 2;
else if(x > -2)
y = 3;
else
y = 4; 13