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Can a switch statement have multiple cases?
The switch can includes multiple cases where each case represents a particular value. Code under particular case will be executed when case value is equal to the return value of switch expression. If none of the cases match with switch expression value then the default case will be executed.
Can we use if-else in switch case?
A switch statement is usually more efficient than a set of nested ifs. Deciding whether to use if-then-else statements or a switch statement is based on readability and the expression that the statement is testing. Prefer switch if the number of cases are more than 5 otherwise, you may use if-else too.
Can we use multiple default statement in switch statement?
There can be at most one default statement. The default statement doesn’t have to come at the end. It may appear anywhere in the body of the switch statement.
Which data type Cannot be used with switch statement?
1) The expression used in switch must be integral type ( int, char and enum). Any other type of expression is not allowed.
What is difference between if else if and switch case?
In the case of ‘if-else’ statement, either the ‘if’ block or the ‘else’ block will be executed based on the condition. In the case of the ‘switch’ statement, one case after another will be executed until the break keyword is not found, or the default statement is executed.
Why do we need break statement after every switch case?
The break statement is used inside the switch to terminate a statement sequence. When a break statement is reached, the switch terminates, and the flow of control jumps to the next line following the switch statement. The break statement is optional.
What is the advantage of switch statement over ELSE IF statement?
Some key advantages of switch over if-else ladder: It’s because the compiler generates a jump table for a switch during compilation. As a result, during execution, instead of checking which case is satisfied, it only decides which case has to be executed. It’s more readable compared to if-else statements.
What is the difference between if-else if and switch case?
When to use if else or switch statements?
If the condition inside if statements is false, then by default the else statement is executed if created. If the condition inside switch statements does not match with any of cases, for that instance the default statements is executed if created. It is difficult to edit the if-else statement, if the nested if-else statement is used.
Are there any case statements in a switch?
There can be any number of case statements within a switch. Each case is followed by the value to be compared to and after that a colon. When the variable being switched on is equal to a case, the statements following that case will execute until a break statement is reached.
When does a switch statement contain a break?
Not every case needs to contain a break. If no break appears, the flow of control will fall through to subsequent cases until a break is reached i.e. all the case statements will get executed as soon as compiler finds a comparison to be true. A switch statement can have an optional default case, which must appear at the end of the switch.
Is switch case replacement of nested IF ELSE?
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