Answer to Question #165933 in Algorithms for Jean Claude

Question

State whether each of the following is true or false. Explain why.

1. The default case is required in the switch selection statement.
2. The break statement is required in the last case of a switch selection statement.
3. The expression ( (x > y) && (a < b ) ) is true if either x > y is true or a < b is true.
4. An expression containing the || operator is true if either or both of its operands are true.
5. The comma (,) formatting flag in a format specifier (e.g., %,20.2f) indicates that a value should be output with a thousands separator.
6. To test for a range of values in a switch statement, use a hyphen () between the start and end values of the range in a case label.
7. Listing cases consecutively with no statements between them enables the cases to perform the same set of statements.

Answer 1

1. False, the default case is optional in switch case, if the no default action is required then we can avoid it.
2. False, The break statement is used to exit from the switch structure. If the default case is the last case then it is not required.
3. False, If both the relational operator will be true then only the entire expression will be true, else it will be false.
4. True, It will be true if the both the expression will be true.
5. True.
6. False, In the switch statement, it does not provide a mechanism for the testing ranges of values so every value which are going to test should be listed in a separate case label.
7. True.