# Java switch statement

Java Programming Java8Java Technologies Object Oriented Programming

A switch statement allows a variable to be tested for equality against a list of values. Each value is called a case, and the variable being switched on is checked for each case.

## Syntax

The syntax of enhanced for loop is −

switch(expression) {
case value :
// Statements
break; // optional

case value :
// Statements
break; // optional

// You can have any number of case statements.
default : // Optional
// Statements
}

The following rules apply to a switch statement −

• The variable used in a switch statement can only be integers, convertible integers (byte, short, char), strings and enums.

• You can have any number of case statements within a switch. Each case is followed by the value to be compared to and a colon.

• The value of a case must be the same data type as the variable in the switch and it must be a constant or a literal.

• 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 a break statement is reached, the switch terminates, and the flow of control jumps to the next line following the switch statement.

• 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. 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.

## Example

Live Demo

public class Test {

public static void main(String args[]) {

case 'A' :
System.out.println("Excellent!");
break;
case 'B' :
case 'C' :
System.out.println("Well done");
break;
case 'D' :
System.out.println("You passed");
case 'F' :
System.out.println("Better try again");
break;
default :
}
}
}

## Output

Compile and run the above program using various command line arguments. This will produce the following result −

Well done
Your grade is C

Published on 03-Feb-2018 20:46:15