SMKS | How to Code - JavaScript Const and Let @_smks | Uploaded November 2016 | Updated October 2024, 2 hours ago.
Snippet: gist.github.com/smks/d41c2d6778a3a23965eaea726af2bd01

The let statement declares a block scope local variable, optionally initializing it to a value.

Constants are block-scoped, much like variables defined using the let statement. The value of a constant cannot change through re-assignment, and it can't be redeclared.

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References:
es6-features.org/#Constants
developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Statements/let
developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Grammar_and_types#Constants