how to make a switch

    import java.util.Scanner;
    public class Main2 {
        public static void main(String[] args){
            Scanner scan = new Scanner(System.in);
            int a=scan.nextInt();
            int b=1;
            for (int i=1;i<=30;i++){
                if(i%a==0){
                    b=1;
                    System.out.print("X");
                }else {
                    System.out.print("O");
                }
            }
        }
    }

• I drive 3 into the scanner
• the desired result
• XXXOOOXXXOOOXXXOOOXXX

>Solution :

Try this:

            if (i%a==0) {
                b = 1-b;
            }
            if(b==1){
                System.out.print("X");
            }else {
                System.out.print("O");
            }