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<html>
<head><title>Evaluating_App_on_Sample_Input.html -- ACL2 Version 3.1</title></head>
<body text=#000000 bgcolor="#FFFFFF">
<h2>Evaluating App on Sample Input</h2>
<p>
<img src=green-line.gif><p>
<pre>
ACL2 !><b>(app nil '(x y z))</B>
(X Y Z)<p>
ACL2 !><b>(app '(1 2 3) '(4 5 6 7))</B>
(1 2 3 4 5 6 7)<p>
ACL2 !><b>(app '(a b c d e f g) '(x y z))</B> ; click <a href="Conversion.html">here</a> for an explanation
(A B C D E F G X Y Z)<p>
ACL2 !><b>(app (app '(1 2) '(3 4)) '(5 6))</B>
(1 2 3 4 5 6)<p>
ACL2 !><b>(app '(1 2) (app '(3 4) '(5 6)))</B>
(1 2 3 4 5 6)<p>
ACL2!><b>(let ((a '(1 2))</B>
<b>(b '(3 4))</B>
<b>(c '(5 6)))</B>
<b>(equal (app (app a b) c)</B>
<b>(app a (app b c))))</B>
T
</pre>
<p>
<img src=green-line.gif><p>
As we can see from these examples, ACL2 functions can be executed more or
less as Common Lisp. <p>
The last three examples suggest an interesting property of <code>app</code>.<p>
<a href="The_Associativity_of_App.html"><img src=walking.gif></a>
<br><br><br><a href="acl2-doc.html"><img src="llogo.gif"></a> <a href="acl2-doc-index.html"><img src="index.gif"></a>
</body>
</html>
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