【ES6】変数・定数・関数の「正しい」宣言方法【分かりすぎて怖いJavaScript入門】

Can you explain the difference between let and const? Can you declare it using an arrow function? If you're even slightly confused, be sure to check out this video. ★Sample Code (CodePen) ・Difference in scope between var and let (https://codepen.io/Torahack/pen/ZEbaRXE) ・Mutable and immutable (https://codepen.io/Torahack/pen/OJyOExw) ・Function declaration (https://codepen.io/Torahack/pen/LYpOByr) ★Learning Community This is a community for those who want to become web engineers. Detailed video:    • 【募集中】学習コミュニティ「とらゼミ」の募集を再開しました   Apply here: https://torahack.web.app/community/ ★Japan's Easiest Introduction to React [Basics]    • Playlist   ★Japan's Easiest Introduction to React [Practical]    • 日本一わかりやすいReact入門【実践編】   ★Japan's Easiest Introduction to React-Redux    • 日本一わかりやすいReact-Redux入門   ★Channel Overview I'm a front-end engineer working at a startup. I publish videos about the following:・Front-end Technology Learning Course ・"Engineer Career Theory" to Stay Active Even Three Years Later ・"Study Methods" to Master Programming Languages ​​and Technologies "Quickly and Correctly" ★Twitter Account   / torahack_   ★Qiita https://qiita.com/torahack ★GitHub https://github.com/deatiger #ToraSeminar #JavaScript #Introduction #Engineer #ES6