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What is the scope of the variable declared in the user defined function?

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What is the scope of the variable declared in the user defined function?

(a) whole program

(b) only inside the {} block

(c) the main function

(d) header section

I had been asked this question in an international level competition.

This intriguing question originated from Function Declarations in portion Functions, Namespaces & Exceptions in C++ of C++

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Correct answer is (b) only inside the {} block

To explain: The variable is valid only in the function block as in other.

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