Structs & Methods

A Struct is Go's way of creating custom data types that contain a collection of fields. It is similar to a Class in OOP languages (Java/PHP), but simpler without inheritance.

Methods

We can attach functions to a Struct, which are called Methods. This allows Structs to have behaviors.

When to use?

Use a Struct to represent real-world objects. Examples:

User (Name, Email, Password)
Product (Name, Price, SKU)
Car (Brand, Color, Year)

MAIN.GO

package main
import "fmt"
// Define a User Struct
type User struct {
    Name  string
    Email string
    Age   int
}
// Method: A special function belonging to User
func (u User) SayHello() {
    fmt.Println("Hello, my name is", u.Name)
}
func main() {
    // Creating a new user object
    user1 := User{
        Name: "Raffi",
        Email: "raffi@mail.com",
        Age: 20,
    }
    fmt.Println("User Data:", user1)
    // Calling the method
    user1.SayHello()
}