This article runs through the basics of scope to give beginning to intermediate JavaScript developers a better grasp of this very important concept.

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Functions have scope – a variable declared within a function is not accessible outside that function (vars in a function are “private”)

A variable defined within a function is accessible to its nested functions.

JavaScript is lexically scoped – functions run in the scope they are defined in, rather than the scope they are executed in.

“Evan Longoria” is an American male baseball player. “Eva Longoria” (notice the N missing), is a female actress. They are two different people. I guess the subtle difference tends to look like an error to those not familiar with U.S. pop culture! :o)

I know it’s a demonstration code but it’s still better if a demonstration code makes sense. Posting examples like if (true) then return true; else return true. Is just bad coding.