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Questions and Answers
What is the purpose of a switch statement?
To easily select one option from a number of options when making a decision.
In a switch statement, a special case called ______ is executed if no case value matches the switched value.
default
Which data types are allowed for case values in a switch statement?
Relational operators are allowed in a switch statement.
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What is the function of the break statement in a switch statement?
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What happens if a break statement is not used in a switch case?
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What is the syntax for a switch statement?
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Study Notes
Switch Statement
- The switch statement is used to select a block of code to execute based on a value.
- The value to be compared (switch value) can be a variable, an expression, or a direct value.
- Switch value is compared with a list of values called cases.
- The block of code associated with the case that matches the switch value is executed.
- Execution continues to the next case's code block if no break statement is encountered.
- A break statement stops execution of subsequent cases.
- The default case is executed if no case values match the switch value.
- The switch statement is optional.
Switch Statement Syntax
- Switch and case are keywords and they are written in lowercase.
- The switch value should be of the same data type (integer or character) as the case value.
- Relational operators are not allowed in switch statements.
- A switch statement can have any number of case values.
- Each case is followed by a colon (':').
- Multiple cases can share the same break statement.
- Case values can be placed in any order.
- A default case can be placed anywhere within the switch statement.
- The default case does not require a break statement.
Switch Statement Example
- The example demonstrates the switch statement with an integer switch value and a default case.
- Case 1 executes code that prints "too low" when the switch value is equal to 1.
- Cases 2 and 3 share a break statement and print "good number" if the switch value is 2 or 3.
- If the switch value does not match any of the cases, the default case prints "too high".
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Description
This quiz covers the switch statement in programming, focusing on its syntax, functionality, and usage. You will learn about switch values, cases, break statements, and the default case. Test your understanding of this essential control structure used in various programming languages.
