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let const - Overcome problems with Var

In this video, we explore the problems associated with the var keyword in JavaScript and introduce its replacements: let and const. We demonstrate how using let solves issues with block scoping, specifically in for loops, where each iteration creates a new variable. We also cover how const works similarly in block scoping but prevents variable reassignment, perfect for cases where values should remain constant.

We explain how const only protects the reference, not the object itself, and how to use the Object.freeze() method to prevent modifications. Additionally, we emphasize best practices, suggesting when to use let and const over var.

By the end of this video, you’ll have a solid understanding of when and how to use let, const, and avoid var in your JavaScript code.