computer

5. if (expression) {
statement;
}
rest_of_program;
• expressionbooleantruefalse
expression truestatement rest_of_program
expression falsestatement rest_of_program

6. statement
rest_of_program
expression
true
if (expression) {
statement1;
}
rest_of_program

7. if (expression) {
statement1;
}
else{
statement2;
}
next_statement;
expressionboolean
expression truestatement1next_statement
expression falsestatement2next_statement

8. if (expression){
statement1;
} else {
statement2;
}
rest_of_program
“”
true
statement1
rest_of_program
statement2

9. if (grade == 'A')
System.out.println("You got an A.");
else if (grade == 'B')
System.out.println("You got a B.");
else if (grade == 'C')
System.out.println("You got a C.");
else
System.out.println("You got an F.");

10. switch
switch (expression) {
case value1:
statement1;
case value2:
statement2;
default:
default_statement;
}
char, byte, short or int, long, float, or do
uble.

11. switch (expression){
case value1:
// Do value1 thing
case value2:
// Do value2 thing
...
default:
// Do default action
}
// Continue the program
expression
value1
value1
value2
default action
expression
value2

12. break
switch (expression) {
case value1:
statement1;
break;
case value2:
statement2;
break;
default:
default_statement;
break;
}

13. switch (expression){
case value1:
// Do value1 thing
break;
case value2:
// Do value2 thing
break;
...
default:
// Do default action
break;
}
// Continue the program

14. If-Else
if (grade == 'A')
System.out.println("You got an A.");
else if (grade == 'B')
System.out.println("You got a B.");
else if (grade == 'C')
System.out.println("You got a C.");
else
System.out.println("You got an F.");

15. “”
switch (grade) {
case 'A':
System.out.println("You got an A.");
break;
case 'B':
System.out.println("You got a B.");
break;
case 'C':
System.out.println("You got a C.");
break;
default:
System.out.println("You got an F.");
}

16. 1. while
2. for
3. do-while

17. while
while (expression){
statement
}
truefalse
false

18. int sum = 0;
int i = 1;
while (i <= 10){
sum += i;
i++;
}
sum

19. do..while
do {
statement
} while (expression);
truefalse
false

20. int sum = 0;
int i = 1;
do {
sum += i;
i++;
} while (i <= 10);
sum

21. for
for
init_expression,
loop_condition
increment_expr
for (init_expr; loop_condition; increment_expr) {
statement;
}

22. int sum = 0;
for (int i = 1; i <= 10; i++) {
sum += i;
}
sum

23. for(int div = 0; div < 1000; div++){
if(div % 2 == 0) {
System.out.println("even: " + div);
} else {
System.out.println("odd: " + div);
}
}

24. for(i=0, j=0; i*j < 100; i++, j+=2) {
System.out.println(i * j);
}
int n = 0;
for(; n <= 100;) {
System.out.println(++n);
}

25. while
for

26. continue
continue
/**
* prints out "5689"
*/
for(int m = 5; m < 10; m++) {
if(m == 7) {
continue;
}
System.out.print(m);
}

27. int sum = 0;
for(int i = 1; i <= 10; i++){
if(i % 3 == 0) {
continue;
}
sum += i;
}
sum

28. break
// prints out numbers unless
// num is ever exactly 400
while (num > 6) {
if(num == 400) {
break;
}
System.out.println(num);
num -= 8;
}

29. for(int i = 10; i > 0; i--) {
if (i > 7)
continue;
while (i > 3) {
if(i == 5)
break;
System.out.println(--i);
}
System.out.println(i);
}

30. switchexpression
for
for
for