BASIC ELEMENTS OF JAVA - Java Programming: From Problem Analysis to Program Design - page 97

55 . In Java, a semicolon is used to terminate a statement. The semicolon in Java
is called the statement terminator.
56 . A file containing a Java program always ends with the extension .java .
57 . Prompt lines are executable statements that tell the user what to do.
58 . Corresponding to five arithmetic operators + , - , * , / , and % , Java provides
five compound operators += , -= , *= , /= , and %= , respectively.

2

EXERCISES

1. Mark the following statements as true or false.
a. An identifier can be any sequence of digits and letters.
b. In Java, there is no difference between a reserved word and a prede-
fined identifier.
c. A Java identifier can start with a digit.
d. The operands of the modulus operator must be integers.
e. If the value of a is 4 and the value of b is 3 , then after the statement a = b;
the value of b is still 3 .
f. In an output statement, the newline character may be a part of the string.
g. The following is a legal Java program:
public class JavaProgram
{

public static void main(String[] args)
{
}

}
h. In a mixed expression, all operands are converted to floating-point
numbers.
i. Suppose x = 5 . After the statement y = x++; executes, y is 5 and x is 6 .
j. Suppose a = 5 . After the statement ++a; executes, the value of a is still
5 because the value of the expression is not saved in another variable.
2. Which of the following are valid Java identifiers?

myFirstProgram MIX-UP JavaProgram2

a. b. c.

quiz7 ProgrammingLecture2 1footEquals12Inches d. e. f.

Mike'sFirstAttempt Update Grade 4th

g. h. i.

j. New_Student
3. Which of the following is a reserved word in Java?

int INT Char CHAR a. b. c. d.

4. What is the difference between a keyword and a user-defined identifier?