Page 139 - Introduction to Programming with Java: A Problem Solving Approach

25. Expression evaluation: a) (7 - n) % 2 *
5 % 2 * 7.5 +
1 * 7.5 + 9 ⇒ 7.5 + 9 ⇒
16.5
7.5 + 9 ⇒ 9 ⇒
b) (4 + n / m) / 6.0 * x ⇒
(4 + 2 / 3) / 6.0 * 7.5 ⇒
(4 + 0) / 6.0 * 7.5 =>
4 / 6.0 * 7.5 ⇒ 0.666666666666666667 * 7.5 ⇒ 5.0
26. count++;
27. count -= 3;
28. number *= (number - 1);
29. For variables declared without an initialization, the initial value is referred to as garbage because its actual value is unknown. Use a question mark to indicate a garbage value.
30. Line numbers tell you which statement in the code generates the current trace results.
31. myInteger = (int) myDouble;
32. The variable, letter, is of type char, but the double quotes in "y" specify that the initial value has type String, so the types aArepinacomgpaotible.PItDshoFuld bEe wnrithtena: ncer
char letter = 'y';
33. To print a double quotation mark, put a backslash in front of it, that is, use \".
34. To print a backslash, use two backslashes, that is, use \\.
35. True.
36. List the primitive types this chapter describes, in the following categories: a) Integer numbers: int, long
b) Floating point numbers: float, double
c) Individual text characters and special symbols: char
37. The + and += operators perform concatenation. The + operator does not update the operand at its left. The += operator does update the operand at its left.
38. The charAt method can be used to retrieve a character at a specified position within a string.
39. The equals and equalsIgnoreCase methods can be used to compare strings for equality.
40. Whitespace 􏰀 the characters associated with the spacebar, the tab key, and the enter key.
41. import java.util.Scanner;
42. Scanner stdIn = new Scanner(System.in);
43. line = stdIn.nextLine();
44. number = stdIn.nextDouble();
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