Go Command Line Arguments

by Online Tutorials Library July 14, 2022

Go Command Line Arguments

When we need to execute a program with some arguments, we generally use command line argument. The arguments passed from the console can be received by the Go program and it can be used as an input.

The os.Args is used to get the arguments. The index 0 of os.Args contains the path of the program.

The os.Args[1:] holds provided arguments.

Go Command Line Argument Example 1

 package main  import ( “fmt” “os” ) func main() { var s, arg string for i := 1; i < len(os.Args); i++ { s += arg + os.Args[i]+” ” } fmt.Println(s) } 

Command to run the program:

Output:

Go Command Line Argument Example 2

 package main import “os” import “fmt” func main() { arumentWithPath := os.Args //returns all arguments including path arumentSlice:= os.Args[1:] //returns all elements after path arumentAt2 := os.Args[2] //returns specified argument only  fmt.Println(arumentWithPath) fmt.Println(arumentSlice) fmt.Println(arumentAt2) } 

Output:

[/private/var/folders/by/w452m9913bj8_rmgzgjsvw9w0000gn/T/___cmd_go Tom Dick Harry] [Tom Dick Harry] Dick

Next TopicGo String

Go Command Line Arguments

Go Command Line Arguments

Go Command Line Argument Example 1

Go Command Line Argument Example 2

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