71 lines
1.6 KiB
HTML
71 lines
1.6 KiB
HTML
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<!DOCTYPE HTML PUBLIC "-//W3O//DTD W3 HTML 2.0//EN">
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<!Originally converted to HTML using LaTeX2HTML 95 (Thu Jan 19 1995) by Nikos Drakos (nikos@cbl.leeds.ac.uk), CBLU, University of Leeds >
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<HEAD>
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<TITLE> + (FUNCTION)</TITLE>
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</HEAD>
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<BODY>
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<meta name="description" value=" + (FUNCTION)">
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<meta name="keywords" value="lp">
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<meta name="resource-type" value="document">
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<meta name="distribution" value="global">
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<P>
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<BR> <HR>
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<A HREF="node75.html"><IMG ALIGN=BOTTOM ALT="next" SRC="next_motif.gif"></A>
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<A HREF="node72.html"><IMG ALIGN=BOTTOM ALT="up" SRC="up_motif.gif"></A>
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<A HREF="node73.html"><IMG ALIGN=BOTTOM ALT="previous" SRC="previous_motif.gif"></A> <BR>
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<A HREF="lp.html"><B>Contents</B></A>
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<B> Next:</B>
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<A HREF="node75.html"> - (FUNCTION)</A>
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<B>Up:</B>
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<A HREF="node72.html"> Appendix: Selected Lisp </A>
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<B> Previous:</B>
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<A HREF="node73.html"> * (FUNCTION)</A>
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<BR> <HR> <P>
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<H1> + (FUNCTION)</H1>
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<P>
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<b> Format:</b>
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<tt> (+ <exp1> <exp2> ...)</tt>
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<P>
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<b> Required arguments:</b> None.
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<P>
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Argument expressions must evaluate to numbers.
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<P>
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Argument expressions are evaluated and their sum is computed. See
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below for special cases of zero or one arguments.
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<P>
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<b> Examples:</b>
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<P>
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<BLOCKQUOTE>
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<PRE>> (+ 4 5 6)
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15
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> (+ 123.5 12/3)
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127.5
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> (+ (* 2 3) 8)
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14
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> (+ 'a 1)
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Error: A is not of type NUMBER.
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</PRE>
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</BLOCKQUOTE>
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<P>
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<b> Special Cases:</b>
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<P>
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<BLOCKQUOTE>
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<PRE>> (+ 3)
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3
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> (+)
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0
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</PRE>
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</BLOCKQUOTE>
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<P>
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<BR> <HR>
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<P>
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<ADDRESS>
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<I>© Colin Allen & Maneesh Dhagat <BR>
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March 2007 </I>
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</ADDRESS>
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</BODY>
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