How to define and use structures (structs) in Go?

In Go, structures (structs) are used to define custom data types by grouping together different fields of various types.

Here's how you can define and use structures in Go:

1. Defining a structure:

   type Person struct { Name string Age int Address string }

   This defines a struct type Person with three fields: Name (string), Age (int), and Address (string).

2. Creating an instance of the structure:

   p := Person{ Name: "John Doe", Age: 30, Address: "123 Main St", }

   Here, we create a new instance p of the Person struct and initialize its fields with values using a struct literal.

3. Accessing structure fields:

   fmt.Println(p.Name) // Output: John Doe fmt.Println(p.Age) // Output: 30 fmt.Println(p.Address) // Output: 123 Main St

   You can access individual fields of a struct by using the dot (.) operator followed by the field name.

4. Modifying structure fields:

   p.Age = 40

   Fields of a struct can be modified by assigning new values to them.

Structs can also be used as fields within other structs, allowing you to create nested structures.

For example:

In the above example, Place struct contains a field Location of type Location struct.

You can use structs to define complex data structures, create custom types, and group related data together for efficient handling.