golang-interface-example.go

package main

import "fmt"

// define interfaces
type Vehicle interface {
  Move() string
}

// define structs and implement Vehicle interface
type Car struct {}
func (c Car) Move() string {
  return "The car is moving"
}

type Bike struct {}
func (b Bike) Move() string {
  return "The bike is moving"
}

func main() {
  vehicles := []Vehicle{Car{}, Bike{}}
  for _, vehicle := range vehicles {
    fmt.Println(vehicle.Move())
  }
}