What is an identifier?
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In computer languages, identifiers are tokens (also called symbols) which name the language entities. Some of the kinds of entities an identifier might denote include variables, types, labels, subroutines, and packages. Which character sequences constitute identifiers depends on the lexical grammar of the language.
-Example, name of a variable, function, etc. Identifiers are the user-defined names consisting of 'C' standard character set. As the name says, identifiers are used to identify a particular element in a program.
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