Hands-On Go Programming by Tarik Guney

Author:Tarik Guney
Language: eng
Format: epub
Tags: COM051390 - COMPUTERS / Programming / Open Source, COM051010 - COMPUTERS / Programming Languages / General, COM051000 - COMPUTERS / Programming / General
Publisher: Packt Publishing
Published: 2018-08-29T12:39:07+00:00

log.Println("Doing some logging here...")

log.Fatalln("Fatal: Application crashed!")

}

When we run the preceding code, a new file called log_file is created with the following content:

You may wonder what the difference is between a fatal error and a normal info error. Let's reorder the two lines and see how that new order behaves. Hence, we will run Fatalln first and then Println as follows:

package main

import (

"os"

"fmt"

"log"

)

func main(){

log_file, err := os.Create("log_file")

if err != nil{

fmt.Println("An error occured...")

}

defer log_file.Close()

log.SetOutput(log_file)

log.Fatalln("Fatal: Application crashed!")

log.Println("Doing some logging here...")

}

If you now run the preceding code and check the content of the log_file, you will see that the second Println did not get written:

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