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72 lines
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<!Converted with LaTeX2HTML 0.6.5 (Tue Nov 15 1994) by Nikos Drakos (nikos@cbl.leeds.ac.uk), CBLU, University of Leeds >
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<TITLE>26.5. Loop Constructs</TITLE>
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<meta name="description" value=" Loop Constructs">
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<b>Common Lisp the Language, 2nd Edition</b>
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<BR> <HR><A NAME=tex2html4604 HREF="node244.html"><IMG ALIGN=BOTTOM ALT="next" SRC="icons/next_motif.gif"></A> <A NAME=tex2html4602 HREF="node235.html"><IMG ALIGN=BOTTOM ALT="up" SRC="icons/up_motif.gif"></A> <A NAME=tex2html4596 HREF="node242.html"><IMG ALIGN=BOTTOM ALT="previous" SRC="icons/previous_motif.gif"></A> <A NAME=tex2html4606 HREF="node1.html"><IMG ALIGN=BOTTOM ALT="contents" SRC="icons/contents_motif.gif"></A> <A NAME=tex2html4607 HREF="index.html"><IMG ALIGN=BOTTOM ALT="index" SRC="icons/index_motif.gif"></A> <BR>
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<B> Next:</B> <A NAME=tex2html4605 HREF="node244.html"> Iteration Control</A>
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<B>Up:</B> <A NAME=tex2html4603 HREF="node235.html"> Loop</A>
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<B> Previous:</B> <A NAME=tex2html4597 HREF="node242.html"> User Extensibility</A>
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<HR> <P>
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<H1><A NAME=SECTION003050000000000000000>26.5. Loop Constructs</A></H1>
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<P>
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<img align=bottom alt="change_begin" src="gif/change_begin.gif"><br>
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The remaining sections of this chapter describe the constructs that the Loop Facility
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provides. The descriptions are organized according to the functionality
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of the constructs. Each section begins with a general discussion of
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a particular operation; it then presents the constructs that perform the
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operation.
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<P>
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<UL><LI> Section <A HREF="node244.html#LOOPITERATIONSECTION">26.6</A>,
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``Iteration Control,'' describes iteration
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control clauses that allow directed loop iteration.
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<P>
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<LI> Section <A HREF="node245.html#LOOPTESTSECTION">26.7</A>, ``End-Test Control,''
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describes clauses that stop iteration by providing a conditional expression
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that can be tested after each execution of the loop body.
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<P>
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<LI> Section <A HREF="node246.html#LOOPACCUMSECTION">26.8</A>,
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``Value Accumulation,'' describes constructs
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that accumulate values during iteration and return them from a loop. This section also
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discusses ways in which accumulation clauses can be combined within the
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Loop Facility.
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<P>
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<LI> Section <A HREF="node247.html#LOOPVARSECTION">26.9</A>,
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``Variable Initializations,'' describes the <tt>with</tt>
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construct, which provides local variables for use within the loop
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body, and other constructs that provide local variables.
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<P>
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<LI> Section <A HREF="node248.html#LOOPCONDSECTION">26.10</A>,
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``Conditional Execution,'' describes how to execute loop
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clauses conditionally.
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<P>
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<LI> Section <A HREF="node249.html#LOOPUNCONDSECTION">26.11</A>,
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``Unconditional Execution,'' describes the <tt>do</tt>
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and <tt>return</tt> constructs. It also describes constructs that are
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used in the loop prologue and loop epilogue.
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<P>
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<LI> Section <A HREF="node250.html#LOOPMISCSECTION">26.12</A>,
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``Miscellaneous Features,'' discusses loop data types
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and destructuring. It also presents constructs for naming a loop and
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for specifying initial and final actions.
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</UL>
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<br><img align=bottom alt="change_end" src="gif/change_end.gif">
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<P>
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<BR> <HR><A NAME=tex2html4604 HREF="node244.html"><IMG ALIGN=BOTTOM ALT="next" SRC="icons/next_motif.gif"></A> <A NAME=tex2html4602 HREF="node235.html"><IMG ALIGN=BOTTOM ALT="up" SRC="icons/up_motif.gif"></A> <A NAME=tex2html4596 HREF="node242.html"><IMG ALIGN=BOTTOM ALT="previous" SRC="icons/previous_motif.gif"></A> <A NAME=tex2html4606 HREF="node1.html"><IMG ALIGN=BOTTOM ALT="contents" SRC="icons/contents_motif.gif"></A> <A NAME=tex2html4607 HREF="index.html"><IMG ALIGN=BOTTOM ALT="index" SRC="icons/index_motif.gif"></A> <BR>
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<B> Next:</B> <A NAME=tex2html4605 HREF="node244.html"> Iteration Control</A>
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<B>Up:</B> <A NAME=tex2html4603 HREF="node235.html"> Loop</A>
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<B> Previous:</B> <A NAME=tex2html4597 HREF="node242.html"> User Extensibility</A>
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<HR> <P>
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<HR>
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<P><ADDRESS>
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AI.Repository@cs.cmu.edu
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