【JavaScript】switch-case文の使い方を徹底的に解説！

switch (条件) {
  case 値1:
    // 条件と値1が等しい場合の処理
    break;
  case 値2:
    // 条件と値2が等しい場合の処理
    break;
  default:
    // その他の場合の処理
}

var day = "Sunday";
switch (day) {
  case "Monday":
    console.log("Today is Monday.");
    break;
  case "Tuesday":
    console.log("Today is Tuesday.");
    break;
  case "Wednesday":
    console.log("Today is Wednesday.");
    break;
  case "Thursday":
    console.log("Today is Thursday.");
    break;
  case "Friday":
    console.log("Today is Friday.");
    break;
  case "Saturday":
    console.log("Today is Saturday.");
    break;
  case "Sunday":
    console.log("Today is Sunday.");
    break;
  default:
    console.log("Invalid input.");
}