How to implement error handling with defer and panic in Go?

In Go, we can handle errors using defer and panic statements.

defer statement: This statement is used to define a function that will be called at the end of the surrounding function, irrespective of whether it returns normally or panics. We can use defer to handle errors in the following way:

func someFunction() {
    defer func() {
        if err := recover(); err != nil {
            // Handle the error here
            fmt.Println("Recovered from panic:", err)
        }
    }()
    
    // Code that might panic
    panic("Something went wrong!")
}

In the code above, we defer a function which checks if there has been a panic and handles it accordingly.

panic statement: This statement is used to abruptly terminate the current function and start panicking. We can use panic to throw errors in the following way:

func someFunction() {
    if condition {
        panic("An error occurred!")
    }
}

In the code above, if the condition is true, the function will panic and the error message will be displayed.

By combining defer and panic, we can implement error handling in Go. When a panic occurs, it triggers the deferred function which can capture and handle the error appropriately.