How to create a script in Linux that makes a pyramid of asterisks with the pattern 1, 3, 5, 7, 9, 11, 13, 15, 17 centered
<p>I'm trying to write a shell script to print a pyramid of asterisks like this:</p>

<pre><code>        *
       ***
      *****
     *******
    *********
   ***********
  *************
 ***************
*****************
</code></pre>

<p>Below is my attempt so far. When I run it, I get some errors that say arithmetic expression required. What am I doing wrong?</p>

<pre><code>for (( i = 1; i &lt;= n, i++ )); do
    for (( k = i; k &lt;= n, k++ )); do
        echo -ne " "
    done

    for (( j = 1; j &lt;= 2 * i - 1, j++ )); do
        echo -ne "*"
    done

    echo
done
</code></pre>