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<title>2.4.4 Integer and long integer literals</title>
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<H2><A NAME="SECTION004440000000000000000"></A><A NAME="integers"></A>
<BR>
2.4.4 Integer and long integer literals
</H2>

<P>
Integer and long integer literals are described by the following
lexical definitions:

<P>
<dl><dd class="grammar">
<div class="productions">
<table>
<tr>
    <td><a id='tok-longinteger' xml:id='tok-longinteger'>longinteger</a></td>
    <td>::=</td>
    <td><a class='grammartoken' href="integers.html#tok-integer">integer</a> ("l" | "L")</td></tr>
  <tr>
    <td><a id='tok-integer' xml:id='tok-integer'>integer</a></td>
    <td>::=</td>
    <td><a class='grammartoken' href="integers.html#tok-decimalinteger">decimalinteger</a> | <a class='grammartoken' href="integers.html#tok-octinteger">octinteger</a> | <a class='grammartoken' href="integers.html#tok-hexinteger">hexinteger</a></td></tr>
  <tr>
    <td><a id='tok-decimalinteger' xml:id='tok-decimalinteger'>decimalinteger</a></td>
    <td>::=</td>
    <td><a class='grammartoken' href="integers.html#tok-nonzerodigit">nonzerodigit</a> <a class='grammartoken' href="identifiers.html#tok-digit">digit</a>* | "0"</td></tr>
  <tr>
    <td><a id='tok-octinteger' xml:id='tok-octinteger'>octinteger</a></td>
    <td>::=</td>
    <td>"0" <a class='grammartoken' href="integers.html#tok-octdigit">octdigit</a>+</td></tr>
  <tr>
    <td><a id='tok-hexinteger' xml:id='tok-hexinteger'>hexinteger</a></td>
    <td>::=</td>
    <td>"0" ("x" | "X") <a class='grammartoken' href="integers.html#tok-hexdigit">hexdigit</a>+</td></tr>
  <tr>
    <td><a id='tok-nonzerodigit' xml:id='tok-nonzerodigit'>nonzerodigit</a></td>
    <td>::=</td>
    <td>"1"..."9"</td></tr>
  <tr>
    <td><a id='tok-octdigit' xml:id='tok-octdigit'>octdigit</a></td>
    <td>::=</td>
    <td>"0"..."7"</td></tr>
  <tr>
    <td><a id='tok-hexdigit' xml:id='tok-hexdigit'>hexdigit</a></td>
    <td>::=</td>
    <td><a class='grammartoken' href="identifiers.html#tok-digit">digit</a> | "a"..."f" | "A"..."F"</td></tr>
</table>
</div>
<a class="grammar-footer"
  href="grammar.txt" type="text/plain"
  >Download entire grammar as text.</a>
</dd></dl>

<P>
Although both lower case "<tt class="character">l</tt>" and upper case "<tt class="character">L</tt>" are
allowed as suffix for long integers, it is strongly recommended to always
use "<tt class="character">L</tt>", since the letter "<tt class="character">l</tt>" looks too much like the
digit "<tt class="character">1</tt>".

<P>
Plain integer literals that are above the largest representable plain
integer (e.g., 2147483647 when using 32-bit arithmetic) are accepted
as if they were long integers instead.<A NAME="tex2html1"
  HREF="#foot461"><SUP>2.1</SUP></A>  There is no limit for long integer
literals apart from what can be stored in available memory.

<P>
Some examples of plain integer literals (first row) and long integer
literals (second and third rows):

<P>
<div class="verbatim"><pre>
7     2147483647                        0177
3L    79228162514264337593543950336L    0377L   0x100000000L
      79228162514264337593543950336             0xdeadbeef
</pre></div>

<P>
<BR><HR><H4>Footnotes</H4>
<DL>
<DT><A NAME="foot461">... instead.</A><A
 href="integers.html#tex2html1"><SUP>2.1</SUP></A></DT>
<DD>In versions of Python
prior to 2.4, octal and hexadecimal literals in the range just above
the largest representable plain integer but below the largest unsigned
32-bit number (on a machine using 32-bit arithmetic), 4294967296, were
taken as the negative plain integer obtained by subtracting 4294967296
from their unsigned value.

</DD>
</DL>
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<span class="release-info">Release 2.4.2, documentation updated on 28 September 2005.</span>
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