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<head><title>PBT.html -- ACL2 Version 3.1</title></head>
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<h2>PBT</h2>print the <a href="COMMAND.html">command</a>s back through a <a href="COMMAND.html">command</a> descriptor
<pre>Major Section: <a href="HISTORY.html">HISTORY</a>
</pre><p>
<pre>
Examples:
:pbt :max ; print back through the most recent command
:pbt :x ; print back through the most recent command
:pbt fn ; print back through the introduction of fn
:pbt 5 ; print back through the fifth command executed
:pbt (:x -4) ; print back through the most recent five commands
</pre>
See <a href="COMMAND-DESCRIPTOR.html">command-descriptor</a>.
<p>
<code>Pbt</code> takes one argument, a <a href="COMMAND.html">command</a> descriptor, and prints the
<a href="COMMAND.html">command</a>s from <code>:max</code> (aka <code>:x</code>) through the one described.
See <a href="COMMAND-DESCRIPTOR.html">command-descriptor</a> for a description of what a <a href="COMMAND.html">command</a>
descriptor is. See <a href="PC.html">pc</a> for a description of the format used to
display <a href="COMMAND.html">command</a>s. <code>Pbt</code> will print the <a href="COMMAND.html">command</a>s that <code><a href="UBT.html">ubt</a></code> will
undo.
<br><br><br><a href="acl2-doc.html"><img src="llogo.gif"></a> <a href="acl2-doc-index.html"><img src="index.gif"></a>
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