| 1 | <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> |
| 2 | <html> |
| 3 | <head> |
| 4 | <link rel="STYLESHEET" href="ref.css" type='text/css' /> |
| 5 | <link rel="SHORTCUT ICON" href="../icons/pyfav.png" type="image/png" /> |
| 6 | <link rel='start' href='../index.html' title='Python Documentation Index' /> |
| 7 | <link rel="first" href="ref.html" title='Python Reference Manual' /> |
| 8 | <link rel='contents' href='contents.html' title="Contents" /> |
| 9 | <link rel='index' href='genindex.html' title='Index' /> |
| 10 | <link rel='last' href='about.html' title='About this document...' /> |
| 11 | <link rel='help' href='about.html' title='About this document...' /> |
| 12 | <link rel="next" href="floating.html" /> |
| 13 | <link rel="prev" href="numbers.html" /> |
| 14 | <link rel="parent" href="literals.html" /> |
| 15 | <link rel="next" href="floating.html" /> |
| 16 | <meta name='aesop' content='information' /> |
| 17 | <title>2.4.4 Integer and long integer literals</title> |
| 18 | </head> |
| 19 | <body> |
| 20 | <DIV CLASS="navigation"> |
| 21 | <div id='top-navigation-panel' xml:id='top-navigation-panel'> |
| 22 | <table align="center" width="100%" cellpadding="0" cellspacing="2"> |
| 23 | <tr> |
| 24 | <td class='online-navigation'><a rel="prev" title="2.4.3 Numeric literals" |
| 25 | href="numbers.html"><img src='../icons/previous.png' |
| 26 | border='0' height='32' alt='Previous Page' width='32' /></A></td> |
| 27 | <td class='online-navigation'><a rel="parent" title="2.4 Literals" |
| 28 | href="literals.html"><img src='../icons/up.png' |
| 29 | border='0' height='32' alt='Up One Level' width='32' /></A></td> |
| 30 | <td class='online-navigation'><a rel="next" title="2.4.5 Floating point literals" |
| 31 | href="floating.html"><img src='../icons/next.png' |
| 32 | border='0' height='32' alt='Next Page' width='32' /></A></td> |
| 33 | <td align="center" width="100%">Python Reference Manual</td> |
| 34 | <td class='online-navigation'><a rel="contents" title="Table of Contents" |
| 35 | href="contents.html"><img src='../icons/contents.png' |
| 36 | border='0' height='32' alt='Contents' width='32' /></A></td> |
| 37 | <td class='online-navigation'><img src='../icons/blank.png' |
| 38 | border='0' height='32' alt='' width='32' /></td> |
| 39 | <td class='online-navigation'><a rel="index" title="Index" |
| 40 | href="genindex.html"><img src='../icons/index.png' |
| 41 | border='0' height='32' alt='Index' width='32' /></A></td> |
| 42 | </tr></table> |
| 43 | <div class='online-navigation'> |
| 44 | <b class="navlabel">Previous:</b> |
| 45 | <a class="sectref" rel="prev" href="numbers.html">2.4.3 Numeric literals</A> |
| 46 | <b class="navlabel">Up:</b> |
| 47 | <a class="sectref" rel="parent" href="literals.html">2.4 Literals</A> |
| 48 | <b class="navlabel">Next:</b> |
| 49 | <a class="sectref" rel="next" href="floating.html">2.4.5 Floating point literals</A> |
| 50 | </div> |
| 51 | <hr /></div> |
| 52 | </DIV> |
| 53 | <!--End of Navigation Panel--> |
| 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"> |
| 149 | <tr> |
| 150 | <td class='online-navigation'><a rel="prev" title="2.4.3 Numeric literals" |
| 151 | href="numbers.html"><img src='../icons/previous.png' |
| 152 | border='0' height='32' alt='Previous Page' width='32' /></A></td> |
| 153 | <td class='online-navigation'><a rel="parent" title="2.4 Literals" |
| 154 | href="literals.html"><img src='../icons/up.png' |
| 155 | border='0' height='32' alt='Up One Level' width='32' /></A></td> |
| 156 | <td class='online-navigation'><a rel="next" title="2.4.5 Floating point literals" |
| 157 | href="floating.html"><img src='../icons/next.png' |
| 158 | border='0' height='32' alt='Next Page' width='32' /></A></td> |
| 159 | <td align="center" width="100%">Python Reference Manual</td> |
| 160 | <td class='online-navigation'><a rel="contents" title="Table of Contents" |
| 161 | href="contents.html"><img src='../icons/contents.png' |
| 162 | border='0' height='32' alt='Contents' width='32' /></A></td> |
| 163 | <td class='online-navigation'><img src='../icons/blank.png' |
| 164 | border='0' height='32' alt='' width='32' /></td> |
| 165 | <td class='online-navigation'><a rel="index" title="Index" |
| 166 | href="genindex.html"><img src='../icons/index.png' |
| 167 | border='0' height='32' alt='Index' width='32' /></A></td> |
| 168 | </tr></table> |
| 169 | <div class='online-navigation'> |
| 170 | <b class="navlabel">Previous:</b> |
| 171 | <a class="sectref" rel="prev" href="numbers.html">2.4.3 Numeric literals</A> |
| 172 | <b class="navlabel">Up:</b> |
| 173 | <a class="sectref" rel="parent" href="literals.html">2.4 Literals</A> |
| 174 | <b class="navlabel">Next:</b> |
| 175 | <a class="sectref" rel="next" href="floating.html">2.4.5 Floating point literals</A> |
| 176 | </div> |
| 177 | </div> |
| 178 | <hr /> |
| 179 | <span class="release-info">Release 2.4.2, documentation updated on 28 September 2005.</span> |
| 180 | </DIV> |
| 181 | <!--End of Navigation Panel--> |
| 182 | <ADDRESS> |
| 183 | See <i><a href="about.html">About this document...</a></i> for information on suggesting changes. |
| 184 | </ADDRESS> |
| 185 | </BODY> |
| 186 | </HTML> |