int test = 6;
if ( test != 9) {
    System.out.println("yes");
} else {
    System.out.println("this is else");
}

int age;
age = 3;

switch (age) {
case 1:
    System.out.println("You can crawl");
    break;
case 2:
    System.out.println("You can talk");
    break;
case 3:
    System.out.println("You can get in trouble");
    break;
default:
    System.out.println("I dont know how old you are");
    break;
}