Error Handling

10 pages in this section.

Learn Go's error philosophy: treat errors as values, not exceptions. Understand the error interface, wrapping, and how to handle routine failures.

Go Error Handling Explainer Errors

Error Handling Basics

Learn Go error handling fundamentals with 10 examples, covering the error interface, nil checks, and returning errors from your functions.

Go Error Handling Basics Examples

Sentinel Errors & errors.Is

Learn to use Go sentinel errors and errors.Is for reliable error comparison. Understand when to use sentinels for API contracts and error handling.

Go Error Handling Sentinel Errors

Error Wrapping with %w & errors.As

Learn to wrap errors in Go using fmt.Errorf with %w to add context. Discover how errors.Is and errors.As inspect wrapped error chains.

Go Error Handling Wrapping Errors As

Custom Error Types & Error Interfaces

Design custom Go error types with structured data. Learn to use errors.As and implement optional interfaces without breaking the error contract.

Go Error Handling Custom Error Types

Stack Traces with runtime/debug

Go Error Handling Stack Traces Runtime Debug

Error Handling in Concurrent Code

Go Error Handling Concurrency Errgroup

API Error Design for HTTP and gRPC Services

Go Error Handling API Http

Error Handling Best Practices

Implement consistent error handling in Go libraries and applications. Learn best practices for creating, wrapping, inspecting, and exposing errors.

Go Error Handling Best Practices List

Error Handling Highlights Summary

A single-page roundup of every highlight bullet from the 9 pages in the Error Handling section, grouped by source page so you can scan all 46 takeaways without opening each article individually.

Highlights Summary Error Handling

Error Handling

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Error Handling