Go Interfaces : A beginner's guide

Introduction

An interface at its best, is an interaction point where two different systems meet in order to interact with each other.
Interfaces in Go are none different, they can be understood as interaction points for two or more apparently unrelated types.

The interface in Go language is a built-in construct to introduce custom types. Interfaces are abstract which means that we are not allowed to instantiate them. For some type to be compatible with an interface, it has to implement the metho...