How to access command-line arguments passed to a Go program?

Question

How do I access command-line arguments in Go? They\'re not passed as arguments to main.

A complete program, possibly created by linking m

Answer 1

Quick Answer:

package main

import ("fmt"
        "os"
)

func main() {
    argsWithProg := os.Args
    argsWithoutProg := os.Args[1:]
    arg := os.Args[3]
    fmt.Println(argsWithProg)
    fmt.Println(argsWithoutProg)
    fmt.Println(arg)
}

Test: $ go run test.go 1 2 3 4 5

Out:

[/tmp/go-build162373819/command-line-arguments/_obj/exe/modbus 1 2 3 4 5]
[1 2 3 4 5]
3

NOTE: os.Args provides access to raw command-line arguments. Note that the first value in this slice is the path to the program, and os.Args[1:] holds the arguments to the program. Reference