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Lesson Global Scope And Functions

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Rafael J. Rodriguez edited this page Jan 6, 2017 · 2 revisions

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Lesson: Global Scope and Functions

In JavaScript, scope refers to the visibility of variables. Variables which are defined outside of a function block have Global scope. This means, they can be seen everywhere in your JavaScript code.

Variables which are used without the var keyword are automatically created in the global scope. This can create unintended consequences elsewhere in your code or when running a function again. You should always declare your variables with var.

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