Structs in Go

package main

import "fmt"

// Define a struct.
type person struct {
    name string
    age  int
}

// This function initializes a struct variable and returns a pointer to it.
func NewPerson(name string) *person {
    p := person{name: name}
    p.age = 42
    return &p
}

func main() {
    // Without keys, you can initialize the members in order that they were defined.
    fmt.Println(person{"Bob", 20})
    
    // With keys.
    fmt.Println(person{name: "Alice", age: 30})

    // Omitted members will be initialized with their "zero value".
    fmt.Println(person{name: "Fred"})

    // Returning a pointer to an initialized struct.
    fmt.Println(&person{name: "Ann", age: 40})

    // Calling a function to create our struct.
    fmt.Println(NewPerson("Jon"))

    // Using the dot operator to access the member values. Works with values and pointers.
    s := person{name: "Sean", age: 50}
    fmt.Println(s.name)

    sp := &s
    fmt.Println(sp.age)

    sp.age = 51
    fmt.Println(sp.age)
}