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Define Identifiers

Define Identifiers and their naming convention in brief?

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Identifiers: These are the names given to any class, variable, function, union and so on. Naming convention (or rule) for writing the identifier is as under:

A) The first letter of identifier is always alphabet.
B) Reserve word can’t be taken as identifier name.
C) No special character in the name of identifier except fewer than score sign ‘_’.

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