Welcome to OGeek Q&A Community for programmer and developer-Open, Learning and Share
Welcome To Ask or Share your Answers For Others

Categories

0 votes
368 views
in Technique[技术] by (71.8m points)

javascript - switch statement to compare values greater or less than a number

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

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

Is this possible using Switch?

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;
}
See Question&Answers more detail:os

与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…
Welcome To Ask or Share your Answers For Others

1 Reply

0 votes
by (71.8m points)

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

Try like this

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;
}

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

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


与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…
OGeek|极客中国-欢迎来到极客的世界,一个免费开放的程序员编程交流平台!开放,进步,分享!让技术改变生活,让极客改变未来! Welcome to OGeek Q&A Community for programmer and developer-Open, Learning and Share
Click Here to Ask a Question

...