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What is the important difference between %w and %v when an error is passed to fm...

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What is the important difference between %w and %v when an error is passed to fmt.Errorf?

%v wraps the error, while %w converts it to a string

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%w works only when the error is nil

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%w creates wrapping that can be inspected through the error chain, while %v only formats the value

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There is no behavioral difference

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