Web Reference: 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. 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. Dec 11, 2016 · If a variable could be reassigned, then it should be declared with let, because it is more expressive to reserve const for real constants; const is misleading because it doesn’t stop references being modified;
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