Handling Errors

At this point, our application handles errors by defining error strings, using the function fmt.Errorf() from package fmt. This is a valid approach for small applications, but it’s harder to maintain as our application grows in complexity. For instance, relying only on comparing the error message isn’t a resilient method because the error message may change.

Creating the errors.go file

Earlier, we handled errors by defining error values as exported variables. We can use this approach here to handle simple errors, such as validating input parameters. Add a file errors.go to our project and edit it. Add the package definition and the import section.

For this file, we’re using:

• The package errors to define error values.
• The

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