Go Systems Programming

About error logging

Go offers functions that can help you log your error messages in various ways. You already saw log.Fatal() in funErr.go, which is a somewhat cruel way to deal with simple errors. Put simply, you should have a very good reason to use log.Fatal() in your code. Generally speaking, log.Fatal() should be used instead of the os.Exit() function because it allows you to print an error message and exit your program using just one function call.

Go offers additional error logging functions in the log standard package that behave more gently depending on the situation, which includes log.Printf(), log.Print(), log.Println(), log.Fatalf(), log.Fatalln(), log.Panic(), log.Panicln(), and log.Panicf(). Please note that logging functions ...