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Overview
1:00In this video we'll review the benefits of the new ways for declaring variables.
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 substitute 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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This prevents errors when using for
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loops and
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 it's
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best to start off by declaring
variables with const and
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then using let as and
when you need to resign 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.
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