How do I handle errors in Go programming?

How do I handle errors in Go programming?

In Go, you typically handle errors by checking the return value of functions that can return an error. For example, you can use the following pattern:

result, err := someFunction()
if err != nil {
    // handle the error
}
// use result

Can you give me an example of a function that returns an error?

Sure! Here's a simple example of a function that opens a file and returns an error if it fails:

func openFile(filename string) (*os.File, error) {
    file, err := os.Open(filename)
    if err != nil {
        return nil, err // return the error
    }
    return file, nil // return the file and no error
}

What should I do if I encounter a panic?

If you encounter a panic, you can recover from it using the recover function within a deferred function. Here's an example:

func safeExecute() {
    defer func() {
        if r := recover(); r != nil {
            fmt.Println("Recovered from panic:", r)
        }
    }()
    // code that may panic
}