title: loop with more than one item at a time
body: <p>We can iterate over a set of items, considering one at a time, like this:</p>
  
  <pre><code>#!/bin/bash
  for i in $( ls ); do
      echo item: $i
  done
  </code></pre>
  
  <p>How can we process several items at a time in a similar loop? Something like:</p>
  
  <pre><code>#!/bin/bash
  for i,j,k in $( ls ); do
      echo item i: $i
      echo item j: $j
      echo item k: $k
  done
  </code></pre>
  
  <p>That second shell script is incorrect but should give an accurate illustration of what I am trying to achieve.</p>