// There is no exception handling.
// Functions that might produce an error just declare an additional return value of type `Error`.
// This is the `Error` interface:
type error interface {
    Error() string
}
//
// A function that might return an error:
func doStuff() (int, error) {
}
//
func main() {
    result, error := doStuff()
    if (error != nil) {
        // handle error
    } else {
        // all is good, use result
    }
}