Using "errors" Package

Error handling in Go is designed to be explicit and simple. Instead of using exceptions, functions return an error value along with the expected result. This lesson combines returning and checking errors with using the errors package and explains the built-in error interface.

Understanding the Error Interface

In Go, the error interface is used to represent an error. It is defined as follows:

type error interface {
    Error() string
}

• Explanation:
  • The error interface has a single method, Error(), which returns a string describing the error