How can I handle errors in Go logging?

How can I handle errors in Go logging?

In Go, you can handle errors in logging by using the log package. You can log errors using log.Println or log.Printf.

Can you show me an example of logging an error?

Sure! Here's a simple example:

package main

import (
    "log"
    "os"
)

func main() {
    file, err := os.Open("nonexistent.txt")
    if err != nil {
        log.Printf("Error opening file: %v", err)
    }
}

What if I want to log to a file instead of the console?

You can set up logging to a file by creating a log file and using log.SetOutput. Here's how:

file, err := os.OpenFile("app.log", os.O_CREATE|os.O_WRONLY|os.O_APPEND, 0666)
if err != nil {
    log.Fatal(err)
}
log.SetOutput(file)

Is there a way to log different levels of severity?

Yes, you can create custom loggers for different severity levels. For example, you can have separate loggers for info, warning, and error messages.