Web Reference: Jan 16, 2026 · JavaScript provides three ways to declare variables: var, let, and const, but they differ in scope, hoisting behaviour, and re-assignment rules. var: Declares variables with function or global scope and allows re-declaration and updates within the same scope. Apr 2, 2020 · In this article, we'll discuss var, let and const with respect to their scope, use, and hoisting. As you read, take note of the differences between them that I'll point out. Well organized and easy to understand Web building tutorials with lots of examples of how to use HTML, CSS, JavaScript, SQL, Python, PHP, Bootstrap, Java, XML and more.
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