用于比较大于或小于数字的值的 switch 语句 [英] switch statement to compare values greater or less than a number

问题描述

我想在我正在编写的一些简单代码中使用 switch 语句.

I want to use the switch statement in some simple code i'm writing.

我正在尝试将括号中的变量与值进行比较 <13 或 >= 13.

I'm trying to compare the variable in the parenthesis with values either < 13 or >= 13.

这可以使用 Switch 吗?

var age = prompt("Enter you age");
switch (age) {
    case <13:
        alert("You must be 13 or older to play");
        break;
    case >=13:
        alert("You are old enough to play");
        break;
}

推荐答案

直接不可能，但间接你可以这样做

Directly it's not possible but indirectly you can do this

这样试试

switch (true) {
    case (age < 13):
        alert("You must be 13 or older to play");
        break;
    case (age >= 13):
        alert("You are old enough to play");
        break;
}

这里的 switch 总是会尝试找到真正的值.将首先返回 true 的情况将切换到该情况.

Here switch will always try to find true value. the case which will return first true it'll switch to that.

假设如果年龄小于 13 岁，这意味着该案例将为真，那么它将切换到该案例.

Suppose if age is less then 13 that's means that case will have true then it'll switch to that case.

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