What are interfaces in Go?

What are interfaces in Go?

Interfaces in Go are types that specify a contract by defining methods. They allow different types to be treated uniformly.

Can you give me an example of an interface in Go?

Sure! Here's a simple example:

type Animal interface {
    Speak() string
}

type Dog struct {}

func (d Dog) Speak() string {
    return "Woof!"
}

In this example, Animal is an interface with a Speak method.

How do I implement an interface in a struct?

To implement an interface, just define the methods specified in the interface in your struct. For example, the Dog struct implements the Animal interface by defining the Speak method.

What are the benefits of using interfaces?

Interfaces promote flexibility and decoupling in your code, allowing for easier testing and implementation of different types.