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1 . What is the difference between let, const, and var?

var is function-scoped and can be redeclared. let is block-scoped and can be reassigned. const is block-scoped and cannot be reassigned after initialization. Modern JavaScript applications typically use let and const because they provide better scope control and help prevent unexpected bugs.

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JB

Jeevan Bhargav

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This answer is calibrated for technical interviews. Verify benchmarks in local sandboxes before deploying.