juniorGolang
How does Go handle error management?
Updated Apr 28, 2026
Short answer
Go uses explicit return values for error handling instead of try-catch exception blocks.
Deep explanation
Functions that can fail return an additional value of type error, which is a built-in interface. The caller must check if the error is nil. This promotes treating errors as normal, expected values and forces developers to handle them explicitly at the call site.
Real-world example
Validating user input in an HTTP handler and returning a 400 Bad Request immediately if an error is returned by the validation function.
Common mistakes
- Ignoring errors by using the blank identifier `_` (e.g., `res, _ := doSomething()`), leading to silent failures.
Follow-up questions
- What is the `error` type?