编程中“let”变量的语言意义 [英] linguistic meaning of 'let' variable in programming

问题描述

所以，我是一个JavaScript程序员，新版本的javascript（ES6）有一个新的关键字声明变量： let ，在旧的 var 。

So, I'm a javascript programmer and the new version of javascript (ES6) has a new keyword for declaring variables: let, next to the old one var.

我知道这两者之间的区别，但我在问自己：让代表什么？ var 显然是变量的缩写，但是 let ？是缩写也是吗？这是从哪里来的？

I know the difference between these two, but I was asking myself: what does let stand for? var obviously is an abbreviation of 'variable', but let? Is it an abbreviation as well? Where does it come from?

我已经google了，令我惊奇的是，我找不到答案。我已经知道Swift还有一个 let 关键字（它们用于常量），但显然还有一些其他编程语言也使用它。

I googled this and to my amazement, I couldn't find an answer. I already knew Swift also has a let keyword (they use it for constants), but apparently some other programming languages use it as well.

推荐答案

它来自英语单词let。

It comes from the English word 'let'.

动词：let，let 。
1.
允许或允许：

verb: "let", "letting". 1. to allow or permit:

// Hey computer, can you please
let 
// this
night = 'wonderful'

Lisp 具有关键字 let 他自1958年以来一直在，尽管它可能来自更早。

Lisp has the keyword let and his been around since 1958, though it may have come from even earlier.

这篇关于编程中“let”变量的语言意义的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！