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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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	54
	55	<H2><A NAME="SECTION004440000000000000000"></A><A NAME="integers"></A>
	56	<BR>
	57	2.4.4 Integer and long integer literals
	58	</H2>
	59
	60	<P>
	61	Integer and long integer literals are described by the following
	62	lexical definitions:
	63
	64	<P>
65	<dl><dd class="grammar">
66	<div class="productions">
67	<table>
68	<tr>
69	<td><a id='tok-longinteger' xml:id='tok-longinteger'>longinteger</a></td>
70	<td>::=</td>
71	<td><a class='grammartoken' href="integers.html#tok-integer">integer</a> ("l" \| "L")</td></tr>
72	<tr>
73	<td><a id='tok-integer' xml:id='tok-integer'>integer</a></td>
74	<td>::=</td>
75	<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>
76	<tr>
77	<td><a id='tok-decimalinteger' xml:id='tok-decimalinteger'>decimalinteger</a></td>
78	<td>::=</td>
79	<td><a class='grammartoken' href="integers.html#tok-nonzerodigit">nonzerodigit</a> <a class='grammartoken' href="identifiers.html#tok-digit">digit</a>* \| "0"</td></tr>
80	<tr>
81	<td><a id='tok-octinteger' xml:id='tok-octinteger'>octinteger</a></td>
82	<td>::=</td>
83	<td>"0" <a class='grammartoken' href="integers.html#tok-octdigit">octdigit</a>+</td></tr>
84	<tr>
85	<td><a id='tok-hexinteger' xml:id='tok-hexinteger'>hexinteger</a></td>
86	<td>::=</td>
87	<td>"0" ("x" \| "X") <a class='grammartoken' href="integers.html#tok-hexdigit">hexdigit</a>+</td></tr>
88	<tr>
89	<td><a id='tok-nonzerodigit' xml:id='tok-nonzerodigit'>nonzerodigit</a></td>
90	<td>::=</td>
91	<td>"1"..."9"</td></tr>
92	<tr>
93	<td><a id='tok-octdigit' xml:id='tok-octdigit'>octdigit</a></td>
94	<td>::=</td>
95	<td>"0"..."7"</td></tr>
96	<tr>
97	<td><a id='tok-hexdigit' xml:id='tok-hexdigit'>hexdigit</a></td>
98	<td>::=</td>
99	<td><a class='grammartoken' href="identifiers.html#tok-digit">digit</a> \| "a"..."f" \| "A"..."F"</td></tr>
100	</table>
101	</div>
102	<a class="grammar-footer"
103	href="grammar.txt" type="text/plain"
104	>Download entire grammar as text.</a>
105	</dd></dl>
106
107	<P>
108	Although both lower case "<tt class="character">l</tt>" and upper case "<tt class="character">L</tt>" are
109	allowed as suffix for long integers, it is strongly recommended to always
110	use "<tt class="character">L</tt>", since the letter "<tt class="character">l</tt>" looks too much like the
111	digit "<tt class="character">1</tt>".
112
113	<P>
114	Plain integer literals that are above the largest representable plain
115	integer (e.g., 2147483647 when using 32-bit arithmetic) are accepted
116	as if they were long integers instead.<A NAME="tex2html1"
117	HREF="#foot461"><SUP>2.1</SUP></A> There is no limit for long integer
118	literals apart from what can be stored in available memory.
119
120	<P>
121	Some examples of plain integer literals (first row) and long integer
122	literals (second and third rows):
123
124	<P>
125	<div class="verbatim"><pre>
126	7 2147483647 0177
127	3L 79228162514264337593543950336L 0377L 0x100000000L
128	79228162514264337593543950336 0xdeadbeef
129	</pre></div>
130
131	<P>
132	<BR><HR><H4>Footnotes</H4>
133	<DL>
134	<DT><A NAME="foot461">... instead.</A><A
135	href="integers.html#tex2html1"><SUP>2.1</SUP></A></DT>
136	<DD>In versions of Python
137	prior to 2.4, octal and hexadecimal literals in the range just above
138	the largest representable plain integer but below the largest unsigned
139	32-bit number (on a machine using 32-bit arithmetic), 4294967296, were
140	taken as the negative plain integer obtained by subtracting 4294967296
141	from their unsigned value.
142
143	</DD>
144	</DL>
145	<DIV CLASS="navigation">
146	<div class='online-navigation'>
147	<p></p><hr />
148	<table align="center" width="100%" cellpadding="0" cellspacing="2">
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