1. Announcements Exam 1 Thursday Everything through Lab 5 50 minutes
15 % of Total Grade
Covers Everything through Lecture last Week
General Topics (terminology, variables, constants, basics)
if-then-else
Compound statements
Relational operators
Equality operators and .equals()
Logical operators
Switch/Case Statements

2. Iteration
Iteration (Looping): Performing a Series of Statements Multiple Times until Some Condition Is Met.
Eliminates the Need for Redundant Coding or Function Calls
Many Ways to Loop in JAVA

3. The while Loop Syntax: while (condition) statement; while (condition){
statement; }

4. while Example final int MAX = 100; int counter = 0;
while (counter < MAX) {
System.out.println( counter + “ “ );
counter++; }

5. Example while Loop int numEmployees,curNum = 0;
System.out.print(“Enter Number of Employees: “);
numEmployees = scan.nextInt();
if (numEmployees > 0) {
while (curNum < numEmployees)
System.out.println( “Welcome to CorpLand!” );
curNum++; }

6. The for Loop Syntax: Same as: for (expression1;condition; expression2)
statement; { }
Same as:
expression1;
while (condition)
expression2;

7. Example for Loop System.out.println( “Welcome to CorpLand!” ); }
int numEmployees,curNum;
System.out.print(“Enter Number of Employees: “);
numEmployees = scan.nextInt();
if (numEmployees > 0) {
for (curNum = 0; curNum < numEmployees;curNum++)
System.out.println( “Welcome to CorpLand!” ); }

8. Looping for Input char letterEntered = ‘A’; String stringE;
while (letterEntered != ‘Z’) {
System.out.print(“Enter a letter: “);
stringE = scan.next();
letterEntered = stringE.charAt(0); }

9. Looping until Flag boolean noMoreData(); boolean done = false; …
while (!done) {
// do a bunch of stuff
if (noMoreData() == true)
done = true; }
System.out.println(“ We’re all through – thank you!”);

10. Nested Loops int i , j ; for (i=0; i < 10; i++) {
for (j=0; j < 10; j++)
System.out.print(i);
System.out.print(j);
System.out.print(“ “ ); }
System.out.println();

11. The do-while Loop
Syntax do
statement;
while (condition); { }

12. do-while Example char letterEntered; String stringE; do {
System.out.print(“Enter a letter: “);
stringE = scan.next();
letterEntered = stringE.charAt(0); }
while (letterEntered != ‘Z’);

13. What Is This? while (!stringEntered.equals(“apple”)) {
System.out.println( “Enter a red fruit: “);
stringEntered = scan.next(); }
while (!stringEntered.equals(“banana”))
System.out.println(“Enter a yellow fruit: “);
while (!stringEntered.equals(“pomegranate”))
System.out.println(“Enter a random fruit: “);

14. What Is This? for (i = 0; i < 10 ; i++)
System.out.println( “Interesting, isn’t it?”);
while (answer.charAt(0) != ‘D’) {
System.out.print( “Enter an answer: “);
answer = scan.next(); }

15. What Is This? void kingsChair(int loopCounter) { int num;
for(num = 0; num < loopCounter; num++)
System.out.println(“AAAAAAAAAAAAAAAAAAAAAAAAAA”); }

16. Announcements Exam 1 Thursday Everything through Lab 5 50 minutes
15 % of Total Grade
Covers Everything through Lecture last Week
General Topics (terminology, variables, constants, basics)
if-then-else
Compound statements
Relational operators
Equality operators and .equals()
Logical operators
Switch/Case Statements