Switch

• case can only use the below data types
  • byte or Byte
  • short or Short
  • int or Int
  • enum (>= Java 5)
  • String (>= Java 7)
• case values MUST be compile-time constants ONLY(final variables)

---

• Swtch Expression, available from (>= Java 13)
• Example:

var quarter = switch (month) {
  case JAN, FEB, MAR -> "Q1";
  case APR, MAY, JUN -> "Q2";
  case JUL, AUG, SEP -> "Q3";
  case OCT, NOV, DEC -> "Q4";
  default -> throw IllegalArgumentException("Invalid Quarter Month Passed");
};

• can use yield keyword for more elaborated java expression evaluation within a code block
• CANNOT return a value
• All Cases MUST be covered