47 lines
1.0 KiB
HTML
47 lines
1.0 KiB
HTML
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 3.2 Final//EN">
|
|
<html>
|
|
<head>
|
|
<meta name="generator" content="HTML Tidy, see www.w3.org">
|
|
<meta http-equiv="Content-Type" content=
|
|
"text/html; charset=utf-8">
|
|
<title>While command</title>
|
|
<LINK rel="stylesheet" type="text/css" href="../rzahg/ic.css">
|
|
</HEAD>
|
|
<body bgcolor="#FFFFFF">
|
|
<!-- Java sync-link -->
|
|
<SCRIPT LANGUAGE="Javascript" SRC="../rzahg/synch.js" TYPE="text/javascript"></SCRIPT>
|
|
|
|
|
|
|
|
<h2>While command</h2>
|
|
|
|
<p>The syntax of the <strong>while</strong> command is</p>
|
|
|
|
<p><strong>while</strong> <em>list1</em></p>
|
|
|
|
<p><strong>do</strong> <em>list2</em></p>
|
|
|
|
<p><strong>done</strong></p>
|
|
|
|
<p><strong>qsh</strong> runs the two lists repeatedly while the
|
|
exit status of <em>list1</em> is zero. When the exit status of <em>
|
|
list1</em> is non-zero the command completes.</p>
|
|
|
|
<p><strong>Examples</strong></p>
|
|
|
|
<ol>
|
|
<li>A while command to iterate until a condition is met.
|
|
<pre>
|
|
max=100
|
|
index=0
|
|
while [[ $index -lt $max ]] ; do
|
|
echo Index is $index
|
|
let index+=1
|
|
done
|
|
</pre>
|
|
</li>
|
|
</ol>
|
|
|
|
</body>
|
|
</html>
|