Controlling Java Program Code - Quiz Explanation

The answers you selected are indicated below, along with text that explains the correct answers.

1.	Each `case` match in a `switch` statement must be: Please select the best answer.
	A.	An integer
	B.	A character
	C.	A constant
	The correct answer is C. Each `case` match in a `switch` statement must be a constant, which is compared against the `switch` expression for a match. Any primitive Java data type can be used in a `case` match for a `switch` statement as long as it is constant.

2.	Which one of the following loop components does the `while` loop utilize? Please select the best answer.
	A.	`LoopCondition`
	B.	`InitializationExpression`
	C.	`StepExpression`
	The correct answer is A. The `while` loop utilizes a loop condition to determine whether it executes a loop statement.`for` loops are the only loops that utilize initialization expressions and step expressions.

3.	What differentiates a `do` loop from a `while` loop? Please select the best answer.
	A.	The loop condition of a `do` loop is executed before the loop statement.
	B.	The loop condition of a `do` loop is executed after the loop statement.
	C.	The loop statement of a `do` loop is sometimes never executed.
	The correct answer is B. The difference between a `do` loop and a `while` loop is that the loop condition of a `do` loop is executed after the loop statement. The loop statement of a `do` loop is always executed at least once.

4.	What Java statement do you use to break out of a loop or branch? Please select the best answer.
	A.	`break`
	B.	`halt`
	C.	`exit`
	The correct answer is A. The `break` statement is used to break out of a branch or loop. There are no such Java statements as `halt` and `exit`.

5.	What Java statement is used to skip to the next iteration of a loop? Please select the best answer.
	A.	`skip`
	B.	`continue`
	C.	`break`
	The correct answer is B. The `continue` statement is used to skip to the next iteration of a loop. There is no such Java statement as `skip`. The `break` statement is used to break out of a branch or loop.

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