> For the complete documentation index, see [llms.txt](https://jimmy-walker.gitbook.io/linux-shell/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://jimmy-walker.gitbook.io/linux-shell/shell-brief/shell-input.md).

# Shell input

\#Brief The shell command and any arguments to that command appear as *numbered* shell variables: `$0` has the string value of the command itself, something like `script`, `./script`, `/home/user/bin/script` or whatever. Any arguments appear as `"$1"`, `"$2"`, `"$3"` and so on. The count of arguments is in the shell variable `"$#"`.

\#Command

```shell
$ cat myscript
#!/bin/bash
echo "$#"
echo "$0"
echo "First arg: $1"
echo "Second arg: $2"
$ ./myscript hello world
2
./myscript.sh
First arg: hello
Second arg: world
```