JavaScript/保留字/case

thecase关键字

thecase关键字用于 switch 语句，它是复杂 if … else if … else 语句的替代方案。

示例

代码

  var array = [2, 3, 5, 7, 10, 11];

  for (var i = 0; i < array.length; i++) {
    switch (array[i]) {
    case 0:
    case 1:
    case 2:
    case 3:
    case 4:
    case 5:
    case 6:
    case 7:
    case 8:
    case 9:
      alert(array[i] + " is a number with one digit.");
      break;
    default:
      alert(array[i] + " is a number with several digits.");
      break;
    }
  }

返回以下内容

2 is a number with one digit.
3 is a number with one digit.
5 is a number with one digit.
7 is a number with one digit.
10 is a number with several digit.
11 is a number with several digit.

另请参阅

• break
• default
• switch