Go by Example: Structs

Go’s structs are typed collections of fields. They’re useful for grouping data together to form records.

package main
import "fmt"

This person struct type has name and age fields.

type person struct {
    name string
    age  int
func main() {

This syntax creates a new struct.

    fmt.Println(person{"Bob", 20})

You can name the fields when initializing a struct.

    fmt.Println(person{name: "Alice", age: 30})

Omitted fields will be zero-valued.

    fmt.Println(person{name: "Fred"})

An & prefix yields a pointer to the struct.

    fmt.Println(&person{name: "Ann", age: 40})

Access struct fields with a dot.

    s := person{name: "Sean", age: 50}

You can also use dots with struct pointers - the pointers are automatically dereferenced.

    sp := &s

Structs are mutable.

    sp.age = 51
$ go run structs.go
{Bob 20}
{Alice 30}
{Fred 0}
&{Ann 40}

Next example: Methods.