Structs

Context

A struct is a collection of fields. It is the main way to group data in Go. Structs are value types, but pointers to structs are common for efficiency.

Example

Define a struct, create instances, and access fields.

Code example

package main

import "fmt"

type Person struct {
    Name string
    Age  int
}

func main() {
    p1 := Person{"Alice", 30}
    p2 := Person{Name: "Bob", Age: 25}
    var p3 Person
    p3.Name = "Charlie"
    p3.Age = 35

    fmt.Println(p1, p2, p3)

    // Pointer to struct
    ptr := &p1
    ptr.Age = 31          // no need to dereference
    fmt.Println(p1)
}

Output

{Alice 30} {Bob 25} {Charlie 35}
{Alice 31}

Useful links

• Go spec: Struct types
• Go by Example: Structs