javascript
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![此图像的alt属性为空;文件名为image-31-1024x469.png](http://www.hengyiyingshi.xyz/wp-content/uploads/2020/02/image-31-1024x469.png)
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![此图像的alt属性为空;文件名为image-34-1024x254.png](http://www.hengyiyingshi.xyz/wp-content/uploads/2020/02/image-34-1024x254.png)
//*
JS中的数据类型分为两大类:
1.基本数据类型
<1>数字 number 100 3.14
<2>字符串string
<3>布尔值boolean
<4>特殊数据类型 null defined未声明
2.复合数据类型
![此图像的alt属性为空;文件名为image-35.png](http://www.hengyiyingshi.xyz/wp-content/uploads/2020/02/image-35.png)
![此图像的alt属性为空;文件名为image-36.png](http://www.hengyiyingshi.xyz/wp-content/uploads/2020/02/image-36.png)
![此图像的alt属性为空;文件名为image-37-1024x544.png](http://www.hengyiyingshi.xyz/wp-content/uploads/2020/02/image-37-1024x544.png)
![此图像的alt属性为空;文件名为image-38-1024x517.png](http://www.hengyiyingshi.xyz/wp-content/uploads/2020/02/image-38-1024x517.png)
![此图像的alt属性为空;文件名为image-39-1024x522.png](http://www.hengyiyingshi.xyz/wp-content/uploads/2020/02/image-39-1024x522.png)
![此图像的alt属性为空;文件名为image-40.png](http://www.hengyiyingshi.xyz/wp-content/uploads/2020/02/image-40.png)
![此图像的alt属性为空;文件名为image-41.png](http://www.hengyiyingshi.xyz/wp-content/uploads/2020/02/image-41.png)
![此图像的alt属性为空;文件名为image-42.png](http://www.hengyiyingshi.xyz/wp-content/uploads/2020/02/image-42.png)
![此图像的alt属性为空;文件名为image-43-1024x483.png](http://www.hengyiyingshi.xyz/wp-content/uploads/2020/02/image-43-1024x483.png)
![此图像的alt属性为空;文件名为image-44-1024x209.png](http://www.hengyiyingshi.xyz/wp-content/uploads/2020/02/image-44-1024x209.png)
![此图像的alt属性为空;文件名为image-45-1024x540.png](http://www.hengyiyingshi.xyz/wp-content/uploads/2020/02/image-45-1024x540.png)
![此图像的alt属性为空;文件名为image-46.png](http://www.hengyiyingshi.xyz/wp-content/uploads/2020/02/image-46.png)
smartcat.994
//*
JS中的数据类型分为两大类:
1.基本数据类型
<1>数字 number 100 3.14
<2>字符串string
<3>布尔值boolean
<4>特殊数据类型 null defined未声明
2.复合数据类型