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In summary, constants are your first
option when declaring variables.

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They're used to prevent reassignment bugs
and to help you debug your code faster.

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Const variables have block level scoping.

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A block of code is anything
between curly braces.

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The let keyword is a great substituent for

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var when you're wanting
to reassign a value.

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For example, when you're
incrementing an index in a loop or

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adding strings together.

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00:00:27,840 --> 00:00:31,020
This prevents errors
when using four loops and

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adding dynamic functionality to web pages.

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The usage of the var keyword
is not recommended anymore,

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since there are a number of scoping
issues associated with the var keyword.

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It's best to start of by
declaring variables with const and

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then using let as and
when you need to re-assign variables.

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I hope you've enjoyed this
workshop on const and let.

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Now you can use these new ways to
declare variables to avoid the pitfalls

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of programming JavaScript and
have better functioning code.