Custom Error Types in Go

Learn how to implement custom error types in Go by understanding the error interface and creating structured error handling solutions. Discover how Go's error system works as an interface with a single Error() string method, allowing any type to become an error by implementing this method. Explore creating custom error types using structs to carry additional context beyond simple string messages, and understand why fmt.Println(err) automatically calls the Error() method for meaningful output. Master adding extra information to errors such as validation field details or resource identifiers, enabling more informative error handling in your Go programs. Practice implementing custom error types through hands-on examples and challenges, building essential skills for writing maintainable Go code with clear failure reporting mechanisms.