Definition and Usage
定义与用法

The length property returns the number of characters in a string.
length属性返回一个字符串的字符数量

Syntax
语法

stringObject.length

Example
实例

In this example we will show how to use the length property to return the number of characters in a string:
在下面的例子中，我们将岩石如何用length属性来返回一个字符串的字符数：

<script type="text/javascript">

var txt="Hello World!"
document.write(txt.length)

</script>

The output of the code above will be:
输出结果为：

12

Try-It-Yourself Demos
互动演练

length
In this example we will show how to use the length property.
在本例子中，我们将演示如何应用length属性

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