Error Handling: errors.New, Wrapping & Custom Types | Go Tutorial #19

Learn error handling in Go! This lesson covers everything from basic error creation to custom error types. 📚 What you'll learn: - Creating errors with errors.New - Returning errors from functions - Error wrapping with fmt.Errorf and %w - Checking errors with errors.Is - Custom error types with errors.As - Sentinel error patterns Go uses explicit error returns instead of exceptions, making error handling predictable and clear. ⏱️ Timestamps: 0:00 - Introduction 0:27 - Error Basics (errors.New, returning errors) 3:12 - Error Wrapping (fmt.Errorf, %w, Unwrap) 5:53 - Checking Errors (errors.Is, sentinel errors) 8:58 - Custom Error Types (errors.As) 12:08 - Recap 12:45 - Up Next: Defer, Panic, Recover 💻 Code: https://github.com/GoCelesteAI/go_errors 🔔 Subscribe for more Go tutorials! #golang #go #programming #tutorial #errorhandling #coding #learntocode