How to embed built-in types (e.g., int, string) into custom structs in Go?

To embed built-in types into custom structs in Go, you can use struct composition. Here's an example of how to embed built-in types like int and string into a custom struct:

package main

import "fmt"

type Person struct {
    Name     string
    Age      int
    Address  Address    // Embedding struct Address
}

type Address struct {
    Street   string
    City     string
    ZipCode  int
}

func main() {
    // Creating a new Person with embedded Address
    person := Person{
        Name: "John Doe",
        Age: 30,
        Address: Address{
            Street:   "123 Main St",
            City:     "New York",
            ZipCode:  10001,
        },
    }

    fmt.Println(person.Name)
    fmt.Println(person.Age)
    fmt.Println(person.Address.Street)
    fmt.Println(person.Address.City)
    fmt.Println(person.Address.ZipCode)
}

In the above example, the Person struct includes an embedded Address struct, which in turn has embedded built-in types like string and int. You can access the embedded types directly using dot notation, as shown in the main function.