How to use os package and flag package to read main command input parameters

Today, I will talk to you about how to use os package and flag package to read main command input parameters, which may not be well understood by many people. In order to make you understand better, the editor summarized the following content for you. I hope you can get something according to this article.

The Args of the os package includes the command name itself as the first value of the read parameter.

The input parameter after flag.Args reads the command (to be used with flag.Parse ()).

That is, os has one more command name read than flag.

Package main import ("flag"fmt"os") func main () {/ / os.Args mode args: = os.Args if args = = nil | | len (args)

< 2 { fmt.Println("Hello 世界!") } else { fmt.Println("Hello ", args[1]) // 第二个参数，第一个参数为命令名 } // flag.Args方式 flag.Parse() var ch []string = flag.Args() if ch != nil && len(ch) >

0 {fmt.Println ("Hello", ch [0]) / / the beginning of the first parameter}} after reading the above, do you have any further understanding of how to use os package and flag package to read main command input? If you want to know more knowledge or related content, please follow the industry information channel, thank you for your support.