Switch case

• A switch case is a control statement that lets you run different blocks of code based on the value of a variable or expression.
• It’s often cleaner and easier to read than writing many if–else statements.
• It allows only the local variable.
• We use break; to stop the execution after the expected result is executed. Intead of break; we can use ->. ex: case 1: System.out.println("Monday"); break; instead of this we can use below(from java 12th version) case 1 -> System.out.println("Monday");
• In the primitive data types it allows only int, byte, short, char.

• It allows non-primitive data type String(from java 8 released) .
  Example-1:
  public static void main(String[] args) {

  int day=5;
  

  //primitive data type - it allows only int, byte, short, char
  //non-primitive data type - it allows String

  switch (day) //Expression
  {
  case 1:
      System.out.println("Monday");
  break;
  case 2:
      System.out.println("Tuesday");
      break;
  case 3:
      System.out.println("Wednesday");
      break;
  default:
      System.out.println("Holiday");
  }
  

  }
  }
  Example-2:
  package moduleTwo;

public class SwitchCaseTest {

public static void main(String[] args) {

    String say="hello";

    switch (say) //Expression
    {
    case "hi":
        System.out.println("hey");
    break;
    case "hello":
        System.out.println("Good morning");
        break;
    default:
        System.out.println("unknown");
    }
}

}
Example-3:
public class SwitchCaseTest {

public static void main(String[] args) {

String grade="B";
switch (grade) //Expression
{
case "A","B" ->System.out.println("pass");
case "C" -> System.out.println("fail");
default -> System.out.println("no result");
}

}
}