Go: What is the difference between error and exception?

error — value. Exception — not in Go.

1func Divide(a, b int) (int, error) {
2    if b == 0 {
3        return 0, errors.New("div by zero")
4    }
5    return a / b, nil
6}

When to use error:

• All expected failures.
• Library code.

Common mistakes:

• Ignoring errors.
• Not wrapping errors.
• Using == instead of errors.Is().
• Creating error strings with capitals.
• Overusing panic.