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 multiple packages, must have one package called main, with a function

func main() { ... }

defined. The function main.main() takes no arguments and returns no value.

Answer 1

You can access the command-line arguments using the os.Args variable. For example,

package main

import (
    "fmt"
    "os"
)

func main() {
    fmt.Println(len(os.Args), os.Args)
}

You can also use the flag package, which implements command-line flag parsing.