If you are familiar with JavaScript you might be aware that JavaScript uses lexical scoping . Now what really is lexical scoping and how is it different than other languages like java ?
What is actually a scope ? A scope is the visibility and accessibility of the variable . So when a JavaScript function tries to refer to a variable , the scope of the variable comes into play . Now lexical scoping means the variable will be accessible to the function only if it was in scope when it was defined.
The key point is variable does have different scopes while definition and execution.
What is actually a scope ? A scope is the visibility and accessibility of the variable . So when a JavaScript function tries to refer to a variable , the scope of the variable comes into play . Now lexical scoping means the variable will be accessible to the function only if it was in scope when it was defined.
The key point is variable does have different scopes while definition and execution.
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