I am writing a CLI interface program in Go.my program requires a user to enter a filename as an argument . following is the code I wrote to handle the situations in which user doesn&#x27;t enter any argument . but it panics and gives an error &quot;index out of range&quot;.how do I handle this?<p>if len(os.Args) == 0 {
        fmt.Println(&quot;usage: gohex  &lt;filename&gt;&quot;)<p><pre><code>        os.Exit(1)
    }</code></pre>
Ask HN: Golang :how do i handle index out of range error?