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What happens if switch case is empty?

What happens if switch case is empty?

In this case what will happen is that the switch will enter at the appropriate case statment, so if ch=’ ‘ at the top then run until it hits a break . This means that if ch is one of ‘ ‘,’\t’ or ‘\n’ then state will be set to SEEK . Leaving a case empty does not go to default, it drops through to the next case.

Is default case necessary in switch?

No it is not necessary of default case in a switch statement and there is no rule of keeping default case at the end of all cases it can be placed at the starting andd middle of all other cases.

What will happen if break statement is not used in a switch case?

Answer: Switch case statements are used to execute only specific case statements based on the switch expression. If we do not use break statement at the end of each case, program will execute all consecutive case statements until it finds next break statement or till the end of switch case block.

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Can I have switch without default?

Should a “switch” statement always include a default clause? No. It should usually include a default. Including a default clause only makes sense if there’s something for it to do, such as assert an error condition or provide a default behavior.

Can you use default block any where in the switch?

default marks the block that would get executed if the switch expression does not match any case labels. In your example, default contains no break , so it would fall through and execute the same code as for case 0 .

How do you set a default case on a switch?

A switch statement can have an optional default case, which must appear at the end of the switch. The default case can be used for performing a task when none of the cases is true. No break is needed in the default case.

What is the purpose of default in switch case?

Does switch need default C#?

In C#, duplicate case values are not allowed. The data type of the variable in the switch and value of a case must be of the same type. The default statement is optional and it can be used anywhere inside the switch statement.

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Can switch case be used without break?

switch() can only contain char and int . break is used to exit from switch statement. switch case can be without default case.

What is the significance of default clause in a switch statement?

Question: What is the significance of default clause in a switch statement? Answer: default clause in switch statement works as the same as else clause in if else block. To simplify my statement, when no cases in the switch clause matches with the proper condition, then default clause is executed.

Is default statement optional in switch case?

The default statement is optional and can appear anywhere inside the switch block. In case, if it is not at the end, then a break statement must be kept after the default statement to omit the execution of the next case statement.

Does default need break?

There is no need for a break in the default case. It runs smack into a closing brace. When cases above return values, rather than set them, they don’t need break, either.

What is the default case of a switch statement?

A switch statement can have an optional default case, which must appear at the end of the switch. The default case can be used for performing a task when none of the cases is true. No break is needed in the default case.

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What happens if there is no break in a switch statement?

If no break appears, the flow of control will fall through to subsequent cases until a break is reached. A switch statement can have an optional default case, which must appear at the end of the switch. The default case can be used for performing a task when none of the cases is true. No break is needed in the default case.

Is the default condition always the last clause in a switch?

The “default” condition can be anyplace within the switch that a case clause can exist. It is not required to be the last clause. I have seen code that put the default as the first clause. The “case 2:” gets executed normally, even though the default clause is above it.

Do we need to break the default case before every statement?

if default case is at last then break statement have no use. if it is before any other case then break is required. since usually we are putting default at the end so you can omit it..