54 lines
5.1 KiB
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54 lines
5.1 KiB
HTML
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<!-- Common Lisp HyperSpec (TM), version 7.0 generated by Kent M. Pitman on Mon, 11-Apr-2005 2:31am EDT -->
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<TITLE>CLHS: Variable /, //, ///</TITLE>
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<H1><A REV=MADE HREF="http://www.lispworks.com/"><IMG WIDTH=80 HEIGHT=65 ALT="[LISPWORKS]" SRC="../Graphics/LWSmall.gif" ALIGN=Bottom></A><A REL=TOP HREF="../Front/index.htm"><IMG WIDTH=237 HEIGHT=65 ALT="[Common Lisp HyperSpec (TM)]" SRC="../Graphics/CLHS_Sm.gif" ALIGN=Bottom></A> <A REL=PREV HREF="v__stst_.htm"><IMG WIDTH=40 HEIGHT=40 ALT="[Previous]" SRC="../Graphics/Prev.gif" ALIGN=Bottom></A><A REL=UP HREF="c_enviro.htm"><IMG WIDTH=40 HEIGHT=40 ALT="[Up]" SRC="../Graphics/Up.gif" ALIGN=Bottom></A><A REL=NEXT HREF="f_lisp_i.htm"><IMG WIDTH=40 HEIGHT=40 ALT="[Next]" SRC="../Graphics/Next.gif" ALIGN=Bottom></A></H1>
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<A NAME="SL"><A NAME="SLSL"><A NAME="SLSLSL"><I>Variable</I> <B>/, //, ///</B></A></A></A> <P>
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<P><B>Value Type:</B><P>
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<P>
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a <A REL=DEFINITION HREF="26_glo_p.htm#proper_list"><I>proper list</I></A>. <P>
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<P><B>Initial Value:</B><P>
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<P>
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<A REL=DEFINITION HREF="26_glo_i.htm#implementation-dependent"><I>implementation-dependent</I></A>. <P>
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<P><B>Description:</B><P>
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<P>
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The <A REL=DEFINITION HREF="26_glo_v.htm#variable"><I>variables</I></A> <A REL=DEFINITION HREF="#SL"><B>/</B></A>, <A REL=DEFINITION HREF="#SLSL"><B>//</B></A>, and <A REL=DEFINITION HREF="#SLSLSL"><B>///</B></A> are maintained by the <A REL=DEFINITION HREF="26_glo_l.htm#lisp_read-eval-print_loop"><I>Lisp read-eval-print loop</I></A> to save the values of results that were printed at the end of the loop. <P>
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The <A REL=DEFINITION HREF="26_glo_v.htm#value"><I>value</I></A> of <A REL=DEFINITION HREF="a_sl.htm#SL"><B>/</B></A> is a <A REL=DEFINITION HREF="26_glo_l.htm#list"><I>list</I></A> of the most recent <A REL=DEFINITION HREF="26_glo_v.htm#value"><I>values</I></A> that were printed, the <A REL=DEFINITION HREF="26_glo_v.htm#value"><I>value</I></A> of <A REL=DEFINITION HREF="#SLSL"><B>//</B></A> is the previous value of <A REL=DEFINITION HREF="a_sl.htm#SL"><B>/</B></A>, and the <A REL=DEFINITION HREF="26_glo_v.htm#value"><I>value</I></A> of <A REL=DEFINITION HREF="#SLSLSL"><B>///</B></A> is the previous value of <A REL=DEFINITION HREF="#SLSL"><B>//</B></A>. <P>
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The <A REL=DEFINITION HREF="26_glo_v.htm#value"><I>values</I></A> of <A REL=DEFINITION HREF="a_sl.htm#SL"><B>/</B></A>, <A REL=DEFINITION HREF="#SLSL"><B>//</B></A>, and <A REL=DEFINITION HREF="#SLSLSL"><B>///</B></A> are updated immediately prior to printing the <A REL=DEFINITION HREF="26_glo_r.htm#return_value"><I>return value</I></A> of a top-level <A REL=DEFINITION HREF="26_glo_f.htm#form"><I>form</I></A> by the <A REL=DEFINITION HREF="26_glo_l.htm#lisp_read-eval-print_loop"><I>Lisp read-eval-print loop</I></A>. If the <A REL=DEFINITION HREF="26_glo_e.htm#evaluation"><I>evaluation</I></A> of such a <A REL=DEFINITION HREF="26_glo_f.htm#form"><I>form</I></A> is aborted prior to its normal return, the values of <A REL=DEFINITION HREF="a_sl.htm#SL"><B>/</B></A>, <A REL=DEFINITION HREF="#SLSL"><B>//</B></A>, and <A REL=DEFINITION HREF="#SLSLSL"><B>///</B></A> are not updated. <P>
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<P><B>Examples:</B><P>
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<PRE>
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(floor 22 7) => 3, 1
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(+ (* (car /) 7) (cadr /)) => 22
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</PRE>
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</TT> <P>
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<P><B>Affected By:</B><P>
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<P>
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<A REL=DEFINITION HREF="26_glo_l.htm#lisp_read-eval-print_loop"><I>Lisp read-eval-print loop</I></A>. <P>
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<P><B>See Also:</B><P>
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<P>
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<A REL=DEFINITION HREF="f__.htm#-"><B>-</B></A> (<A REL=DEFINITION HREF="26_glo_v.htm#variable"><I>variable</I></A>), <A REL=DEFINITION HREF="f_pl.htm#PL"><B>+</B></A> (<A REL=DEFINITION HREF="26_glo_v.htm#variable"><I>variable</I></A>), <A REL=DEFINITION HREF="f_st.htm#ST"><B>*</B></A> (<A REL=DEFINITION HREF="26_glo_v.htm#variable"><I>variable</I></A>), <A REL=CHILD HREF="25_aa.htm">Section 25.1.1 (Top level loop)</A> <P>
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<P><B>Notes:</B> None.
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<P>
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