Java Switch Statement

Java Switch Statement just like if-else-if ladder statement executes on a statement from multiple conditions. Java Switch Statement Syntax...

Java Switch Statement just like if-else-if ladder statement executes on a statement from multiple conditions.

Java Switch Statement Syntax

[switch(expression ){

        case value1:
        //code to be executed;     

   break;  //optional       

 case value2:
        //code to be executed;     

   break;  //optional        ......

default:
        code to be executed if all cases fail to match;

        }
]

Example:

[

public class JavaSwitchStatementExample {
    public static void main(String args[])
    {
        int score=30;
        switch(score)
        {
            case 30:
                System.out.println("Number is 30");
                break;
            case 40:
                System.out.println("Number is 40");
                break;
            case 50:
                System.out.println("Number is 50");
                break;
            case 60:
                System.out.println("Number is 60");
                break;
            default:
                System.out.println("No match for the number");


        }
    }

}

]

Java Switch Statement can be a fall-through

If break keyword is not used,Java Switch Statement becomes a fall-through.

Run below code and compare the result with above.

[

public class JavaSwitchStatementExample {
    public static void main(String args[])
    {
        int score=40;
        switch(score)
        {
            case 30:
                System.out.println("Number is 30");

            case 40:
                System.out.println("Number is 40");

            case 50:
                System.out.println("Number is 50");

            case 60:
                System.out.println("Number is 60");

            default:
                System.out.println("No match for the number");


        }
    }

}

]

You should note the Different between the two outputs.