Quick JavaScript Crash Course - Modern and Advanced JavaScript - Let Const Rather than Var

The lecture discusses the issues with the 'WAR' keyword and introduces 'let' and 'construction' as replacements. 'Let' is used for block-scoped variables, ensuring correct behavior in loops. 'Construction' is used for constants, preventing reassignment. The lecture also covers the limitations of 'const' in protecting object references and suggests using the 'freeze' method for deeper protection. Best practices recommend using 'let' for variables that change and 'const' for constants.

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