Interfaces

Lesson in the Go Roadmap · Stage 17: Interfaces

Last updated 14 September 2026

What is Interfaces?

Define contracts specifying method signatures without implementation. Types satisfy interfaces implicitly by implementing required methods. Enable polymorphism and loose coupling. Empty interface interface{} accepts any type. Foundation of Go's type system and composition patterns.

Study this in the interactive course See the whole Go roadmap

Free resources to learn Interfaces

ArticleInterfaces - Go by Example
ArticleMastering Go Interfaces: From Basics to Best Practices

Interfaces: common questions

Can I learn Interfaces in Hindi?

This lesson is written in English. Once you sign in, open it in the interactive course and ask the AI tutor to explain Interfaces in Hindi or Hinglish. The tutor answers from this lesson’s own text, so it stays on the syllabus, and it runs on your own Google, OpenAI or Anthropic key.

Is this Interfaces tutorial for beginners?

It is lesson 69 of 172 in the free Go roadmap, in stage 17, Interfaces. If you are new to Go, start from stage 1 and come back here in order; if you already know the earlier stages, this lesson stands on its own.