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What is the meaning of enumerator in C#?
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An enumeration is a complete, ordered listing of all the items in a collection. The term is commonly used in mathematics and computer science to refer to a listing of all of the elements of a set.
An enumeration, or Enum , is a symbolic name for a set of values. Enumerations are treated as data types, and you can use them to create sets of constants for use with variables and properties.
An enumeration is a data type that consists of a set of named values that represent integral constants, known as enumeration constants. An enumeration is also referred to as an enumerated type because you must list (enumerate) each of the values in creating a name for each of them.
An enumeration is used in any programming language to define a constant set of values. For example, the days of the week can be defined as an enumeration and used anywhere in the program. In C#, the enumeration is defined with the help of the keyword 'enum'.
An enumerator helps you enumerate (iterate) over a collection of items.
You can infer the purpose by simply looking at the members of the IEnumerator Interface. More specifically, the Enumerator knows exactly where you are in the collection (the current item) and where the next item is (the MoveNext method).
Check out the Wikipedia article on the Iterator:
Iterator - Wikipedia
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