package main import ( "log" ) func main() { log.Println("hello log") } >> 実行結果 2014/07/22 11:49:15 hello log … func main() { log.SetFlags(log.Ldate | log.Ltime | log.Lshortfile) log.Println("hello log") } >> 実行結果 2014/07/22 11:50:04 main.go:9: hello log