Structs

• Structs in Solidity allows you to create more complicated data types that have multiple properties. You can define your own type by creating a struct.
• They are useful for grouping together related data.
• Structs can be declared outside of a contract and imported in another contract.

Defining a Struct

To define a Struct, you must use the struct keyword. The struct keyword defines a new data type, with more than one member. The format of the struct statement is as follows −

struct struct_name { 
   type1 type_name_1;
   type2 type_name_2;
   type3 type_name_3;
}

Example

struct Book { 
   string title;
   string author;
   uint book_id;
}

Accessing a Struct and its variable

To access any member of a structure, we use the member access operator (.). The member access operator is coded as a period between the structure variable name and the structure member that we wish to access. You would use the struct to define variables of structure type.

Example

The following example shows how to use a structure in a program.

Example here