errors package

Canonical docs for sentinels, wrapping, joining, and error inspection via errors.Is and errors.As.

• Author: Go Team
• Authority: primary
• Kind: package-doc
• URL: https://pkg.go.dev/errors

What it covers

• error wrapping and unwrapping
• sentinel and typed error inspection
• joined errors and traversal

Why authoritative

Official package documentation for Go’s core error inspection and wrapping APIs.

Use when

• how should I compare errors in Go
• when should I use errors.Is or errors.As
• what does the errors package support here

Keywords

• errors package, errors.Is, errors.As, errors.Join, wrapping

Used by

• error-wrapping
• error-comparison
• errors-join