如何在JavaScript中声明变量?
原文英文,约600词,阅读约需2分钟。发表于: 。While coding in JavaScript, variables are essential for storing data values that can be used and manipulated throughout your program and can be used several times in the program. JavaScript...
JavaScript中有三种变量声明方式:var、let和const。var作用域广泛但易出错;let适用于可变值,作用域限于块;const用于不可变值,必须初始化。现代JavaScript推荐使用let和const,以提高代码清晰度和减少错误。