The difference between a reserved word and a user-defined identifier is that A reserved word is known to be the keyword that is often used in programming language that act as the mark to a structure of a statement while the standard identifier is known to be the keyword that tells or defines a given type.
Some use the word such as"keyword" and "reserved word" are known to be used a lot interchangeably, but others differentiate its usage, by the use of "keyword" to connote a word that is unique if only in some certain cases but "reserved word" to connote a unique word that cannot be used as a type of user-defined name.
Therefore, The difference between a reserved word and a user-defined identifier is that A reserved word is known to be the keyword that is often used in programming language that act as the mark to a structure of a statement while the standard identifier is known to be the keyword that tells or defines a given type.
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