log is a powerful logging framework that provides log custom log level.

log provides Fatal, Error , Warn, Info, Debug level log.

Use Log just as you would use print.

func main(){
	ctx := context.Background()
	
	v, err := rand.Int(rand.Reader, big.NewInt(int64(16)))
    	if err != nil {
    		log.ErrorContext(ctx, " rand.In failed", "error", err.Error())
    		return 
    	}
	log.InfoContext(ctx, "the rand Int result", "v", v)
}

This use is made of the key and the Value output.

This is free software distributed under the terms of the MIT license