# getopt [](https://godoc.org/git.sr.ht/~sircmpwn/getopt) [](https://builds.sr.ht/~sircmpwn/getopt)
A POSIX-compatible getopt implementation for Go, because POSIX getopt is The
Correct Way to interpret arguments to command line utilities.
Please send patches/bugs/feedback to
[~sircmpwn/public-inbox@lists.sr.ht](https://lists.sr.ht/~sircmpwn/public-inbox).
## Example Usage
```go
import (
"os"
"git.sr.ht/~sircmpwn/getopt"
)
func main() {
opts, optind, err := getopt.Getopts(os.Args, "abc:d:")
if err != nil {
panic(err)
}
for _, opt := range opts {
switch opt.Option {
case 'a':
println("Option -a specified")
case 'b':
println("Option -b specified")
case 'c':
println("Option -c specified: " + opt.Value)
case 'd':
println("Option -d specified: " + opt.Value)
}
}
println("Remaining arguments:")
for _, arg := range os.Args[optind:] {
println(arg)
}
}
```
A [flag](https://golang.org/pkg/flag/)-like interface is also supported.
```go
import (
"git.sr.ht/~sircmpwn/getopt"
)
func main() {
a := getopt.Bool("a", false, "turn on option a")
b := getopt.Int("b", 1, "set b to a numerical value")
var opt string
getopt.StringVar(&opt, "c", "", "let c be specified string")
err := getopt.Parse()
if err != nil {
panic(err)
}
print("Value of a: ")
println(*a)
print("Value of b: ")
println(*b)
println("Value of c: " + opt)
println("Remaining arguments:")
for _, arg := range getopt.Args() {
println(arg)
}
}
```