笔记JavaScript变量的相关内容

文章 2024-03-01 来自：开发者社区

编程笔记 html5&css&js 075 Javascript 常量和变量

在JavaScript中，变量和常量是用来存储数据的占位符。它们的主要区别在于可变性：变量的值可以改变，而常量一旦被声明后其值就不能再更改。一、JavaScript 变量定义：在JavaScript中，使用var、let或const关键字来声明变量。不过，从ES6（ECMAScript 2015）开始，推荐使用let和const而不是var，因为它们提供了...

文章 2023-08-16 来自：开发者社区

前端学习笔记202305学习笔记第三十三天-js-使用const声明变量特点

文章 2023-08-15 来自：开发者社区

前端学习笔记202305学习笔记第三十三天-js-使用const声明变量特点2

文章 2023-08-15 来自：开发者社区

前端学习笔记202305学习笔记第三十三天-js-使用const声明变量特点

文章 2023-08-12 来自：开发者社区

前端学习笔记202305学习笔记第三十三天-js-使用let声明变量的特点

文章 2022-10-30 来自：开发者社区

Web前端开发笔记——第四章 JavaScript程序设计第二节变量

一、JavaScript中的注释JavaScript中单行注释通过“//”，多行注释通过“/*”开头并以“*/”结尾。二、变量的命名规则JavaScript中命名变量必须以字母开头（也能以 $ 或 _ 符号开头），且变量名不能包含空格和标点符号，另外变量里不能是关键字、保留字作为变量名。例如：var default、var 2cots、var number first都是错误的命名。三、变量声明....

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更新时间 2024-03-02 10:40:48

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