http://www.nowamagic.net/javascript/js_JumpLoops.php
多重循環在編程中會經常遇到，那麼在JavaScript中如何指定跳出那層的循環呢。其實這也是break的一個用法，下面是一個不錯的例子，來自《JavaScript權威指南》，可以參考下：
Code
01 |
<script
type="text/javascript"> |
02 |
outerloop://命名外圈語句 |
03 |
for(i=0;
i<10; i++) |
04 |
{ |
05 |
innerloop://命名內圈語句 |
06 |
for(j=0;
j<10; j++) |
07 |
{ |
08 |
//
跳出內圈循環 |
09 |
if(j>3){break;} |
10 |
//
跳出內圈循環 |
11 |
if(i==2){break innerloop;} |
12 |
//
跳出外圈循環 |
13 |
if(i==4){break outerloop;} |
14 |
document.write("i
= "+i+"
, j = "+j+"<br
/>"); |
15 |
} |
16 |
} |
17 |
document.write("final"+"
i = "+i+"
, j = "+j); |
18 |
</script> |
程序運行結果：
01 |
i
= 0 , j = 0 |
02 |
i
= 0 , j = 1 |
03 |
i
= 0 , j = 2 |
04 |
i
= 0 , j = 3 |
05 |
i
= 1 , j = 0 |
06 |
i
= 1 , j = 1 |
07 |
i
= 1 , j = 2 |
08 |
i
= 1 , j = 3 |
09 |
i
= 3 , j = 0 |
10 |
i
= 3 , j = 1 |
11 |
i
= 3 , j = 2 |
12 |
i
= 3 , j = 3 |
13 |
final
i = 4 , j = 0 |