2.1

1. left brace ({), right brace (}).
2. if.
3. //.
4. Space characters, newlines and tabs.
5. Keywords.
6. main.
7. System.out.print, System.out.println and System.out.printf.

2.2

1. False. Comments do not cause any action to be performed when the program executes. They're used to document programs and improve their readability.
2. True.
3. False. Java is case sensitive, so these variables are distinct.
4. False. The remainder operator can also be used with noninteger operands in Java.
5. False. The operators *, / and % are higher precedence than operators + and -.

2.3

1. intc, thisIsAVariable, q76354, number;

   or /fifa-16-licence-key-generator.html.

   intc;

   intthisIsAVariable;

   intq76354;

   intnumber;

2. System.out.print('Enter an integer: ');
3. value = input.nextInt();
4. System.out.println('This is a Java program');
5. System.out.println('This is a Javanprogram');
6. System.out.printf('%sn%sn', 'This is a Java', 'program');

2.4

1. Error: Semicolon after the right parenthesis of the condition ( c < 7 ) in the if. Correction: Remove the semicolon after the right parenthesis. [Note: As a result, the output statement will execute regardless of whether the condition in the if is true.]
2. Error: The relational operator => is incorrect. Correction: Change => to >=.

2.5/ms-office-dmg.html.

1. // Calculate the product of three integers
2. Scanner input =newScanner( System.in );

3. intx, y, z, result;

   or

   intx;

   inty;

   intz;

   intresult;

4. System.out.print('Enter first integer: ');
5. x = input.nextInt();
6. System.out.print('Enter second integer: ');
7. y = input.nextInt();
8. System.out.print('Enter third integer: ');
9. z = input.nextInt();
10. result = x * y * z;
11. System.out.printf('Product is %dn', result );

2.6

The solution to Self-Review Exercise 2.6 is as follows: