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<H1> 2.4.1 Decimal Literals</H1>
<DIV Class="Paranum"><FONT SIZE=-2>1</FONT></DIV>
<DIV Class="Normal"> <A NAME="I1219"></A>A <FONT FACE="Arial, Helvetica">decimal_literal</FONT>
is a <FONT FACE="Arial, Helvetica">numeric_literal</FONT> in the conventional
decimal notation (that is, the base is ten). </DIV>
<H4 ALIGN=CENTER>Syntax</H4>
<DIV Class="Paranum"><FONT SIZE=-2>2</FONT></DIV>
<DIV Class="SyntaxIndented"><FONT FACE="Arial, Helvetica">decimal_literal<A NAME="I1220"></A>
::= </FONT><A NAME="I1221"></A><FONT FACE="Arial, Helvetica">numeral</FONT> [.<A NAME="I1222"></A><FONT FACE="Arial, Helvetica">numeral</FONT>] [<A NAME="I1223"></A><FONT FACE="Arial, Helvetica">exponent</FONT>]</DIV>
<DIV Class="Paranum"><FONT SIZE=-2>3</FONT></DIV>
<DIV Class="SyntaxIndented"><FONT FACE="Arial, Helvetica">numeral<A NAME="I1224"></A>
::= </FONT><A NAME="I1225"></A><FONT FACE="Arial, Helvetica">digit</FONT> {[<A NAME="I1226"></A><FONT FACE="Arial, Helvetica">underline</FONT>] <A NAME="I1227"></A><FONT FACE="Arial, Helvetica">digit</FONT>}</DIV>
<DIV Class="Paranum"><FONT SIZE=-2>4</FONT></DIV>
<DIV Class="SyntaxIndented"><FONT FACE="Arial, Helvetica">exponent<A NAME="I1228"></A>
::= </FONT>E [+] <A NAME="I1229"></A><FONT FACE="Arial, Helvetica">numeral</FONT> | E - <A NAME="I1230"></A><FONT FACE="Arial, Helvetica">numeral</FONT></DIV>
<DIV Class="Paranum"><FONT SIZE=-2>5</FONT></DIV>
<DIV Class="SyntaxIndented">An <FONT FACE="Arial, Helvetica">exponent</FONT>
for an integer literal shall not have a minus sign. </DIV>
<DIV Class="Paranum"><FONT SIZE=-2>5.a</FONT></DIV>
<DIV Class="Annotations"><FONT SIZE=-1><B>Ramification: </B>Although
this rule is in this subclause, it applies also to the next subclause.
</FONT></DIV>
<H4 ALIGN=CENTER>Static Semantics</H4>
<DIV Class="Paranum"><FONT SIZE=-2>6</FONT></DIV>
<DIV Class="Normal"> An underline character in a <FONT FACE="Arial, Helvetica">numeric_literal</FONT>
does not affect its meaning. The letter E of an <FONT FACE="Arial, Helvetica">exponent</FONT>
can be written either in lower case or in upper case, with the same meaning.
</DIV>
<DIV Class="Paranum"><FONT SIZE=-2>6.a</FONT></DIV>
<DIV Class="Annotations"><FONT SIZE=-1><B>Ramification: </B>Although
these rules are in this subclause, they apply also to the next subclause.
</FONT></DIV>
<DIV Class="Paranum"><FONT SIZE=-2>7</FONT></DIV>
<DIV Class="Normal"> An <FONT FACE="Arial, Helvetica">exponent</FONT>
indicates the power of ten by which the value of the <FONT FACE="Arial, Helvetica">decimal_literal</FONT>
without the <FONT FACE="Arial, Helvetica">exponent</FONT> is to be multiplied
to obtain the value of the <FONT FACE="Arial, Helvetica">decimal_literal</FONT>
with the <FONT FACE="Arial, Helvetica">exponent</FONT>. </DIV>
<H4 ALIGN=CENTER>Examples</H4>
<DIV Class="Paranum"><FONT SIZE=-2>8</FONT></DIV>
<DIV Class="Normal" Style="margin-bottom: 0.4em"> <I>Examples of decimal
literals:</I> </DIV>
<DIV Class="Paranum"><FONT SIZE=-2>9</FONT></DIV>
<DIV Class="SyntaxIndented">12 0 1E6 123_456 --<I> integer literals</I><BR>
<BR>
12.0 0.0 0.456 3.14159_26 --<I> real literals</I></DIV>
<H4 ALIGN=CENTER>Wording Changes from Ada 83</H4>
<DIV Class="Paranum"><FONT SIZE=-2>9.a</FONT></DIV>
<DIV Class="Annotations"><FONT SIZE=-1>We have changed the syntactic
category name <FONT FACE="Arial, Helvetica">integer</FONT> to be <FONT FACE="Arial, Helvetica">numeral</FONT>.
We got this idea from ACID. It avoids the confusion between this and
integers. (Other places don't offer similar confusions. For example,
a <FONT FACE="Arial, Helvetica">string_literal</FONT> is different from
a string.) </FONT></DIV>
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