what is structure in c language

In C programming language, a structure is a composite data type that allows the programmer to group variables of different data types into a single type. It is a user-defined data type that can be used to group items of possibly different types into a single type. The struct keyword is used to define the structure in C programming language. The items in the structure are called its members, and they can be of any valid data type. A structure declaration specifies its member variables along with their data type. To use a structure in a program, we have to define its instance by creating variables of the structure type. We can access the members of a structure using the dot syntax. Structures are useful in cases where we need to store similar data of multiple entities. They can be used to represent a record, such as tracking the attributes of a book in a library.