9 lines
285 B
Markdown
9 lines
285 B
Markdown
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---
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title: Check the Length Property of a String Variable
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localeTitle: 检查字符串变量的Length属性
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---
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数据结构具有属性。例如，字符串有一个名为`.length`的属性，它将告诉您字符串中有多少个字符。
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```
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lastNameLength = lastName.length;
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```
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