How do error return values work in Go?

Can you explain how error return values work in Go?

In Go, functions can return multiple values, including an error. The convention is to return the result and an error value.

How do I check if an error occurred after calling a function?

You can check if the error value is nil. If it's not nil, an error occurred, and you can handle it accordingly.

Can you give me an example of a function that returns an error?

Sure! Here's a simple example: func divide(a, b float64) (float64, error) { if b == 0 { return 0, errors.New("division by zero") } return a / b, nil }.

What should I do if I encounter an error?

You should handle the error gracefully, possibly logging it or returning a user-friendly message.