The answer is a tag.
What is structure declaration?
- A "structure declaration" identifies a type and lists a series of variable values (referred to as the structure's "members" or "fields") that may be of different types.
- The name of the structure type is provided via an optional identifier known as a "tag," which may be used in subsequent references to the structure type.
- The whole sequence specified by that type of structure is included in a variable of that type.
- The kinds known as "records" in other languages are analogous to the structures in C.
- A structure is not reserved in the declaration of a structure type. It merely serves as a model for subsequent declarations of structure variables.
Hence, The answer is a tag.
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