A struct is a composite data type that is declared under a logical group. Structs are used to define new types. It is not possible for a struct to contain a member of its own type, although a struct can be the value type of a mapping member. Here is an example of a struct:

struct Gotham {

address Batcave;
uint cars;
uint batcomputer;
uint enemies;
string gordon;
address twoface;

}