Question: How Many Cases Can You Have In Switch Statement?

Are switch statements Bad?

Case statement is used for conditional operations.

Switch case is not a bad syntax, but its usage in some cases categorizes it under code smell.

It is considered a smell, if it is being used in OOPS.

Thus, Switch case should be used very carefully..

Is it possible to use else without if?

‘else’ without ‘if’ This error means that Java is unable to find an if statement associated to your else statement. Else statements do not work unless they are associated with an if statement. Ensure that you have an if statement and that your else statement isn’t nested within your if statement.

How do you check the condition of a switch case?

Here the mark is defined as 100 and when switch statement is executed, the condition will be checked as follows.case mark <=35. true => (100 <= 35) - this will give the result false. ... case mark >=36 && mark <= 60. true === (100 >=36 && 100 <= 60) ... case mark >= 61 && mark <= 80. ... case mark >= 81.

Which data type can accept switch statement?

A switch works with the byte , short , char , and int primitive data types. It also works with enumerated types (discussed in Enum Types), the String class, and a few special classes that wrap certain primitive types: Character , Byte , Short , and Integer (discussed in Numbers and Strings).

How many choices are possible when using a single IF ELSE statement?

two choicesUsing IF and ELSE gives two possible choices (paths) that a program can follow. However, sometimes more than two choices are wanted. To do this, the statement ELSE IF is used.

Can multiple constant be used in case statement?

It can also be an expression which yields an integer value. Each case statement must have only one constant. Multiple constants in the single case statement are not allowed. … After each case constant, we can have any number of statements or no statement at all.

What happens if we don’t use break in switch case?

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.

What is difference between switch case and if else?

The fundamental difference between if-else and switch statements is that the if-else statement “selects the execution of the statements based upon the evaluation of the expression in if statements”. The switch statements “selects the execution of the statement often according to a keyboard command”.

Can the last case of a switch statement skip including the break?

Can the last case of a switch statement skip including the break? Even though the last case of a switch statement does not require a break statement at the end, you should add break statements to all cases of the switch statement, including the last case.

Is it necessary to use break in switch?

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. A switch statement can have an optional default case, which must appear at the end of the switch. … No break is needed in the default case.

Can a switch statement be written without a default case?

select switch, “Switch statement does not have a default case.” A switch statement without a default case may allow execution to ‘fall through’ silently, if no cases are matched.

How do you check multiple conditions in a switch case?

SWITCH STATEMENT: check multiple conditions using AND operator? default: A: ($val>=2 && $val <= 4) A: ($val>=2 && $val <= 4) A: ($val>=2 && $val <= 4) B: ($val>=2 && $val <= 5) D: ($val>=3 && $val <= 6) default:

Can Continue statement be used in switch case?

Switch is not considered as loop so you cannot use Continue inside a case statement in switch…

Is switch case faster than if else?

As it turns out, the switch statement is faster in most cases when compared to if-else , but significantly faster only when the number of conditions is large. The primary difference in performance between the two is that the incremental cost of an additional condition is larger for if-else than it is for switch .

How do you pass multiple values in a switch case?

Second, the only way to use switch with multiple variables is to combine them into one primitive (string, number, etc) value: var stateA = “foo”; var stateB = “bar”; switch (stateA + “-” + stateB) { case “foo-bar”: … … }

Can you do a switch statement with strings?

The switch statement compares the String object in its expression with the expressions associated with each case label as if it were using the String. equals method; consequently, the comparison of String objects in switch statements is case sensitive.

Why is switch better than if else?

A switch statement is usually more efficient than a set of nested ifs. … The compiler can do this because it knows that the case constants are all the same type and simply must be compared for equality with the switch expression, while in case of if expressions, the compiler has no such knowledge.

Can we use continue statement without using loop?

The continue statement can be used with any other loop also like while or do while in a similar way as it is used with for loop above.

Which loop is guaranteed to execute at least one time?

do-while loopThe do-while loop is similar to the while loop, except that the test condition occurs at the end of the loop. Having the test condition at the end, guarantees that the body of the loop always executes at least one time.

How many cases can a switch statement have in Java?

As the size of int ranges from -2,147,483,648 to 2,147,483,647, so you can have a case for each number of them. So there is a limited number of case in case of integer. But if you want to use String in case, then you can have unlimited number of cases as said by Bohemian.

What is the use of break and continue statement?

Break statement mainly used to terminate the enclosing loop such as while, do-while, for or switch statement wherever break is declared. Continue statement mainly skip the rest of loop wherever continue is declared and execute the next iteration.