Tell me about error handling in Go. What is a typical error? How does error handling in Go differ from other languages?

In Go, error handling is based on returning an error value from functions, rather than exceptions as in most other languages.

A typical error in Go is a value of type error, which implements the interface:

type error interface {
    Error() string
}

A function that may end with an error usually returns two values: the result and the error:

func ReadFile(name string) ([]byte, error) {
    // ...
}

Error handling is explicit:

data, err := ReadFile("file.txt")
if err != nil {
    // handle error
    log.Fatal(err)
}
// use data

Differences from other languages:

• No exceptions (try/catch). Errors are handled explicitly and locally.
• This improves readability and predictability of the code, as it is clear where an error might occur.
• No hidden execution paths.

This approach promotes more reliable and understandable error management, but requires discipline and attentiveness when checking errors after each call.