Explanatory Question

What is a static identifier?

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Answer with Explanation

A file-scope variable that is declared static is visible only to functions within that file. A function-scope or block-scope variable that is declared as static is visible only within that scope. Furthermore, static variables only have a single instance. In the case of function- or block-scope variables, this means that the variable is not "automatic" and thus retains its value across function invocations.

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