How to use error handling with defer statements in Go?

In Go, errors are typically handled using a combination of defer statements and the panic and recover functions. Here's how you can use error handling with defer statements:

Define a function that can potentially encounter an error. For example:

func divide(a, b int) (result int, err error) {
    defer func() {
        if r := recover(); r != nil {
            err = fmt.Errorf("panic occurred: %v", r)
        }
    }()
    
    if b == 0 {
        panic("division by zero")
    }
    
    result = a / b
    return result, nil
}

Within the function, use defer to define a function that checks for a panic using the recover function. If a panic occurs, it sets the err variable with an appropriate error message.
Use the panic statement to raise an error condition (panic) if needed. In the example above, a panic is raised if the divisor b is zero.
When calling the function, check the returned error value and handle it accordingly. For example:

result, err := divide(10, 0)
if err != nil {
    fmt.Println("Error:", err)
} else {
    fmt.Println("Result:", result)
}

In the example above, if the divisor is zero, a panic occurs and the error is caught by the deferred function. The error message is then returned.

Note: The panic and recover mechanism in Go is typically used in exceptional situations when the program cannot continue executing normally. It is not intended for regular error handling. Instead, it's recommended to use the error type for typical error conditions and return them explicitly.