How to handle situations where the interface in a programming language contains no methods or properties?

In Go, an interface without methods is called an empty interface interface{}. It can hold values of any type, as all types implement the empty interface.

Example usage:

var i interface{}
 i = 42
fmt.Println(i) // outputs 42

 i = "string"
fmt.Println(i) // outputs string

If an interface contains no methods, it serves to store any value, but to work with a specific type, type assertion or type switch must be used. This allows safely extracting the value of the desired type from the empty interface.