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Update README.md
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yihan12 authored Dec 12, 2023
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# 概述

> 一个变量,就是一个用于存放数值的容器。这个数值可能是一个用于累加计算的数字,或者是一个句子中的字符串。变量的独特之处在于它存放的数值是可以改变的。
# 声明

## let、const和var



# Hoisting(变量提升)



# 命名变量:规则和最佳实践

# 变量的作用域

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