Empty interface

Type interface{} is called an empty interface.

By definition it’s an interface with no methods defined.

That means that every type conforms to an empty interface.

In Go interface{} is used as a dynamic type.

It’s similar to an object in C# or Java because it combines a type and a value into a single value.

Empty interface is also how you implement a union type in Go.

Zero value of empty interface is nil.

Learn more about empty interfaces.