Error Handling in Go

From the Go cheat sheet · Error Handling · verified Jul 2026

Error Handling

Working with errors in Go

go
// Return error
func divide(x, y float64) (float64, error) {
    if y == 0 {
        return 0, errors.New("division by zero")
    }
    return x / y, nil
}

// Check error
result, err := divide(10, 0)
if err != nil {
    log.Fatal(err)
}
❌ Errors are values, not exceptions
🔄 Always check returned errors
📦 Wrap errors with context using %w
🎯 errors.Is() and errors.As() for error checking

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