[size=medium][color=olive]在此之前对break和continue对于终止循环的作用理解的一直不是很好,今天通过对JS的学习终于搞明白了其原理。下面是我的理解:
Break: 命令可以终止循环的运行,然后继续执行循环之后的代码(如果循环之后有代码的话)。
实例:
<html>
<body>
<script type="text/javascript">
var i=0
for (i=0;i<=10;i++)
{
if (i==3){break}
document.write("The number is " + i)
document.write("<br />")
}
</script>
</body>
</html>
结果:
The number is 0
The number is 1
The number is 2
Continue:命令会终止当前的循环,然后从下一个值继续运行。
实例:
<html>
<body>
<script type="text/javascript">
var i=0
for (i=0;i<=10;i++)
{
if (i==3){continue}
document.write("The number is " + i)
document.write("<br />")
}
</script>
</body>
</html>
结果:
The number is 0
The number is 1
The number is 2
The number is 4
The number is 5
The number is 6
The number is 7
The number is 8
The number is 9
The number is 10[/color][/size]
Break: 命令可以终止循环的运行,然后继续执行循环之后的代码(如果循环之后有代码的话)。
实例:
<html>
<body>
<script type="text/javascript">
var i=0
for (i=0;i<=10;i++)
{
if (i==3){break}
document.write("The number is " + i)
document.write("<br />")
}
</script>
</body>
</html>
结果:
The number is 0
The number is 1
The number is 2
Continue:命令会终止当前的循环,然后从下一个值继续运行。
实例:
<html>
<body>
<script type="text/javascript">
var i=0
for (i=0;i<=10;i++)
{
if (i==3){continue}
document.write("The number is " + i)
document.write("<br />")
}
</script>
</body>
</html>
结果:
The number is 0
The number is 1
The number is 2
The number is 4
The number is 5
The number is 6
The number is 7
The number is 8
The number is 9
The number is 10[/color][/size]
本文详细解释了JavaScript中break和continue关键字的功能及其使用场景。通过具体实例展示了如何利用这两个关键字来有效控制循环流程,帮助读者更好地理解并掌握这两种循环控制方式。
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