Can you explain what the Error type in Go language is and how it is used for error handling?

In the Go language, the error type is a built-in interface used for error handling. It is defined as:

type error interface {
    Error() string
}

This means that any type implementing the Error() string method is considered an error.

Usage:

• Functions that may end with an error usually return a value of type error along with the result.
• If there is no error, nil is returned.
• Error checking is done using the condition if err != nil.

Example:

func divide(a, b float64) (float64, error) {
    if b == 0 {
        return 0, fmt.Errorf("division by zero")
    }
    return a / b, nil
}

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

Thus, error in Go is the standard way to pass and handle errors in a program.