Function (local) variables are deleted when the function is completed. In a web browser, global variables are deleted when you close the browser window (or tab).

All variables used in a function should be declared as local variables. Local variables must be declared with the var, the let, or the const keyword, otherwise they will become global variables.

Normally, when you create a variable inside a function, that variable is local, and can only be used inside that function. To create a global variable inside a function, you can use the global keyword.

If you create a variable with the same name inside a function, this variable will be local, and can only be used inside the function. The global variable with the same name will remain as it was, …

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JavaScript variables can belong to: The local scope or The global scope Global variables can be made local (private) with closures. Closures makes it possible for a function to have "private" …

However, you should avoid using the same variable name for both globally and locally variables as it can lead to errors and confusion. In general, you should be careful with global variables, …

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Scope defines where variables can be accessed or modified in your program. It determines the visibility and lifetime of variables - in other words, which parts of your program can "see" and …

A variable created in the main body of the Python code is a global variable and belongs to the global scope. Global variables are available from within any scope, global and local.