golang struct

package main

import (
    "fmt"
)

type Person struct {
    Name    string
    Age     int
    Address Address
}

type Address struct {
    Street     string
    City       string
    PostalCode string
}

func main() {
    person := Person{
        Name: "Alice",
        Age:  30,
        Address: Address{
            Street:     "123 Main St",
            City:       "Wonderland",
            PostalCode: "45678",
        },
    }

    fmt.Println("Name:", person.Name)
    fmt.Println("Age:", person.Age)
    fmt.Println("Street:", person.Address.Street)
    fmt.Println("City:", person.Address.City)
    fmt.Println("Postal Code:", person.Address.PostalCode)
}

Explanation:

• package main: Indicates that this Go file belongs to the main package, which is the entry point of the executable program.
• import "fmt": Imports the fmt package, which provides functions for formatting input and output.
• type Person struct { ... }: Defines a struct named Person that contains fields for Name (string) and Age (int), as well as an Address field of type Address.
• type Address struct { ... }: Defines a struct named Address containing fields for Street (string), City (string), and PostalCode (string).
• func main() { ... }: The entry point of the program. It creates an instance of the Person struct, initializes its fields, and prints out the values of its fields using fmt.Println().

The program demonstrates how to define and use structs in Go, showing how to create instances of structs, initialize their fields, and access nested struct fields through dot notation.