Saturday, 9 April 2016

Use of break statement with switch

How break is useful with switch statement in Java?


               The break statement is used to terminate the statement sequence in a switch statement. If we do not use break statement, the control of flow of the switch continue as usual and just work like an else-if ladder. 

               The below program print the month name on the screen according to the provided number. 

Program:


import java.util.Scanner;
public class SwitchBreakDemo {
    public static void main(String[] args) {

        int month;
        System.out.println("Enter a number to display its corresponding Month Name");
        Scanner in = new Scanner(System.in);  
        month=in.nextInt();
        String monthString;
        switch (month) {
            case 1:  monthString = "January";
                     break;
            case 2:  monthString = "February";
                     break;
            case 3:  monthString = "March";
                     break;
            case 4:  monthString = "April";
                     break;
            case 5:  monthString = "May";
                     break;
            case 6:  monthString = "June";
                     break;
            case 7:  monthString = "July";
                     break;
            case 8:  monthString = "August";
                     break;
            case 9:  monthString = "September";
                     break;
            case 10: monthString = "October";
                     break;
            case 11: monthString = "November";
                     break;
            case 12: monthString = "December";
                     break;
            default: monthString = "Invalid month";
                     break;
        }
        System.out.println(monthString);
    }
}

Output:


Enter a number to display its corresponding Month Name
5
May


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