63 lines
3.5 KiB
HTML
63 lines
3.5 KiB
HTML
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<TITLE>CLHS: Function NUMBERP</TITLE>
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<A NAME="numberp"><I>Function</I> <B>NUMBERP</B></A> <P>
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<P><B>Syntax:</B><P>
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<P>
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<B>numberp</B> <I>object</I> => <I>generalized-boolean</I><P>
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<P>
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<P><B>Arguments and Values:</B><P>
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<P>
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<I>object</I>---an <A REL=DEFINITION HREF="26_glo_o.htm#object"><I>object</I></A>. <P>
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<I>generalized-boolean</I>---a <A REL=DEFINITION HREF="26_glo_g.htm#generalized_boolean"><I>generalized boolean</I></A>. <P>
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<P><B>Description:</B><P>
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<P>
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Returns <A REL=DEFINITION HREF="26_glo_t.htm#true"><I>true</I></A> if <I>object</I> is of <A REL=DEFINITION HREF="26_glo_t.htm#type"><I>type</I></A> <A REL=DEFINITION HREF="t_number.htm#number"><B>number</B></A>; otherwise, returns <A REL=DEFINITION HREF="26_glo_f.htm#false"><I>false</I></A>. <P>
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<P><B>Examples:</B><P>
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<P>
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<PRE>
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(numberp 12) => <A REL=DEFINITION HREF="26_glo_t.htm#true">true</A>
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(numberp (expt 2 130)) => <A REL=DEFINITION HREF="26_glo_t.htm#true">true</A>
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(numberp #c(5/3 7.2)) => <A REL=DEFINITION HREF="26_glo_t.htm#true">true</A>
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(numberp nil) => <A REL=DEFINITION HREF="26_glo_f.htm#false">false</A>
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(numberp (cons 1 2)) => <A REL=DEFINITION HREF="26_glo_f.htm#false">false</A>
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</PRE>
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</TT> <P>
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<P><B>Side Effects:</B> None.
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<P>
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<P><B>Affected By:</B> None.
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<P>
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<P><B>Exceptional Situations:</B> None.
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<P>
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<P><B>See Also:</B> None.
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<P>
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<P><B>Notes:</B><P>
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<P>
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<PRE>
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(numberp object) == (typep object 'number)
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</PRE>
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</TT> <P>
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