The default keyword specifies some code to run if there is no case match:
Example
int day = 4;
switch (day) {
  case 6:
    System.out.println("Today is Saturday");
    break;
  case 7:
    System.out.println("Today is Sunday");
    break;
  default:
    System.out.println("Looking forward to the Weekend");
}
// Outputs "Looking forward to the Weekend"
Note that if the default statement is used as the last statement in a switch block, it does not need a break.
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