Go Structs

An introduction to Go structs
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Structs

Go uses structs instead of classes.

A struct defines member variables. To define a function equivalent to a class method, place a receiver such as (variable *StructName), which corresponds to this, before the function name.

package main

import "fmt"

type Person struct {
	name string
	age  int
}

func (p *Person) SetPerson(name string, age int) {
	p.name = name
	p.age = age
}

func (p *Person) GetPerson() (string, int) {
	return p.name, p.age
}

func main() {
	var p1 Person
	p1.SetPerson("devkuma", 23)
	name, age := p1.GetPerson()
	fmt.Printf("%s(%d)\n", name, age)
}

Output:

devkuma(23)

Struct members whose names start with an uppercase letter can be accessed from outside the package. Members whose names start with a lowercase letter cannot be accessed from outside the package.

type Person struct {
	Name   string // accessible outside the package
	Age    int    // accessible outside the package
	status int    // not accessible outside the package
}

When using a struct, initialize its fields as follows.

a1 := Person{ "devkuma", 26 }               // initialize in order
a2 := Person{ name: "devkuma", age: 32 }    // initialize by name