In JavaScript, variable declarations can greatly impact code quality. Understanding when and why to use `var`, `let`, and `const` is essential for modern development. This article highlights the key differences between `var` and `let` in terms of scope, hoisting, and re-declaration. While both are used to declare variables, `let` provides more predictable scoping and reduces the risk of unintended bugs.

Source: https://dev.to/vimuth7/understanding-var-and-let-in-javascript-when-and-why-to-use-each-for-cleaner-code-2hjb