Question

should not be used as identifiers​

Answer 1

Answer:

No, You can not use keyword as Identifiers in C++ or in any language, Following are the rules for the identifiers : ... Only alphabetic characters, digits and underscore (_) are permitted in C++ language for declaring identifier. Other special characters are not allowed for naming a variable / identifier.

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Answer 2

Answer:

Ans1. In a computer language, a reserved word (also known as a reserved identifier) is a word that cannot be used as an identifier, such as the name of a variable, function, or label – it is "reserved from use". This is a syntactic definition, and a reserved word may have no meaning.

Explanation:

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