How do I handle errors in Go?

How do I handle errors in Go?

In Go, you typically handle errors by checking the return value of a function. Most functions return an error as the last return value.

Can you show me an example?

Sure! Here's a simple example:

package main

import (
    "fmt"
    "errors"
)

func mightFail() error {
    return errors.New("something went wrong")
}

func main() {
    if err := mightFail(); err != nil {
        fmt.Println("Error:", err)
    }
}

This checks if mightFail returns an error and prints it if it does.

What if I want to handle multiple errors?

You can use a custom error type or a slice to collect multiple errors. Here's an example:

var errors []error

if err := mightFail(); err != nil {
    errors = append(errors, err)
}

if len(errors) > 0 {
    fmt.Println("Errors:", errors)
}