javascript 如何在javascript中返回到for循环的顶部
声明：本页面是StackOverFlow热门问题的中英对照翻译，遵循CC BY-SA 4.0协议，如果您需要使用它，必须同样遵循CC BY-SA许可，注明原文地址和作者信息，同时你必须将它归于原作者（不是我）：StackOverFlow
原文地址: http://stackoverflow.com/questions/3927136/
Warning: these are provided under cc-by-sa 4.0 license. You are free to use/share it, But you must attribute it to the original authors (not me):
StackOverFlow
how to return to top of for loop in javascript
提问by Darcy
Maybe this is a dumb question but is there a way to return to the top of a loop?
也许这是一个愚蠢的问题，但有没有办法返回到循环的顶部？
Example:
例子：
for(var i = 0; i < 5; i++) {
if(i == 3)
return;
alert(i);
}
What you'd expect in other languages is that the alert would trigger 4 times like so:
您期望在其他语言中警报将触发 4 次，如下所示：
alert(0); alert(1); alert(2); alert(4);
警报（0）；警报（1）；警报（2）；警报（4）；
but instead, the function is exited immediately when i is 3. What gives?
但是，当 i 为 3 时，该函数立即退出。什么给出了？
回答by user113716
Use continueinstead of return.
使用continue代替return。
Example:http://jsfiddle.net/TYLgJ/
示例：http : //jsfiddle.net/TYLgJ/
for(var i = 0; i < 5; i++) {
if(i == 3)
continue;
alert(i);
}
If you wanted to completely halt the loop at that point, you would use breakinstead of return. The returnstatement is used to return a value from a function that is being executed.
如果您想在那时完全停止循环，您可以使用break代替return。该return语句用于从正在执行的函数中返回一个值。
EDIT:Documentation links provided by @epascarellothe comments below.
编辑：@epascarello提供的文档链接下面的评论。
- Docs for
continue: https://developer.mozilla.org/en/JavaScript/Reference/Statements/continue - Docs for
return: https://developer.mozilla.org/en/JavaScript/Reference/Statements/return
回答by Sir Robert
For what it's worth, you can also label them:
对于它的价值，您还可以标记它们：
OUTER_LOOP: for (var o = 0; o < 3; o++) {
INNER_LOOP: for (var i = 0; i < 3; i++) {
if (o && i) {
continue OUTER_LOOP;
}
console.info(o, ':', i);
}
}
outputs:
输出：
0 : 0
0 : 1
0 : 2
1 : 0
2 : 0
