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Difference between var, let, and const.

Entry JavaScript

Answer

  • var: function-scoped, redeclarable, hoisted with undefined.
  • let: block-scoped, cannot redeclare in same scope, hoisted but uninitialized.
  • const: block-scoped, cannot reassign, must initialize.
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This answer has been peer-reviewed by industry experts holding senior engineering roles to ensure technical accuracy and relevance for modern interview standards.

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