What is the difference between the interface in Go language and what features should be known?

In Go language, an interface is a set of methods that a type must implement to be considered as conforming to that interface. Features of interfaces in Go:

• Implicit implementation: a type is considered to implement an interface if it has all the methods of the interface, without explicit declaration.
• Interfaces describe behavior, not data structures.
• Empty interface (interface{}) — an interface with no methods, which can hold a value of any type.
• Interfaces can be nested, combining methods from multiple interfaces.

Example:

package main
import "fmt"

type Reader interface {
    Read(p []byte) (n int, err error)
}

type MyReader struct {}

func (r MyReader) Read(p []byte) (n int, err error) {
    // read implementation
    return 0, nil
}

func main() {
    var r Reader = MyReader{} // MyReader implicitly implements Reader
    fmt.Println(r)
}