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<H1><A NAME="SECTION007000000000000000000"></A><A NAME="expressions"></A>
<a id='l2h-328' xml:id='l2h-328'></a>
<BR>
5. Expressions
</H1>

<P>
This chapter explains the meaning of the elements of expressions in
Python.

<P>
<strong>Syntax Notes:</strong> In this and the following chapters, extended
BNF<a id='l2h-329' xml:id='l2h-329'></a> notation will be used to describe syntax, not lexical
analysis.  When (one alternative of) a syntax rule has the form

<P>
<dl><dd class="grammar">
<div class="productions">
<table>

  <tr>
    <td>name</td>
    <td>::=</td>
    <td>othername</td></tr>
</table>
</div>
</dd></dl>

<P>
and no semantics are given, the semantics of this form of <code>name</code>
are the same as for <code>othername</code>.
<a id='l2h-330' xml:id='l2h-330'></a>

<P>

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<LI><A href="Booleans.html">5.10 Boolean operations</a>
<LI><A href="lambdas.html">5.11 Lambdas</a>
<LI><A href="exprlists.html">5.12 Expression lists</a>
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	54
	55	<H1><A NAME="SECTION007000000000000000000"></A><A NAME="expressions"></A>
	56	<a id='l2h-328' xml:id='l2h-328'></a>
	57	<BR>
	58	5. Expressions
	59	</H1>
	60
	61	<P>
	62	This chapter explains the meaning of the elements of expressions in
	63	Python.
	64
65	<P>
66	<strong>Syntax Notes:</strong> In this and the following chapters, extended
67	BNF<a id='l2h-329' xml:id='l2h-329'></a> notation will be used to describe syntax, not lexical
68	analysis. When (one alternative of) a syntax rule has the form
69
70	<P>
71	<dl><dd class="grammar">
72	<div class="productions">
73	<table>
74
75	<tr>
76	<td>name</td>
77	<td>::=</td>
78	<td>othername</td></tr>
79	</table>
80	</div>
81	</dd></dl>
82
83	<P>
84	and no semantics are given, the semantics of this form of <code>name</code>
85	are the same as for <code>othername</code>.
86	<a id='l2h-330' xml:id='l2h-330'></a>
87
88	<P>
89
90	<p><br /></p><hr class='online-navigation' />
91	<div class='online-navigation'>
92	<!--Table of Child-Links-->
93	<A NAME="CHILD_LINKS"><STRONG>Subsections</STRONG></a>
94
95	<UL CLASS="ChildLinks">
96	<LI><A href="conversions.html">5.1 Arithmetic conversions</a>
97	<LI><A href="atoms.html">5.2 Atoms</a>
98	<UL>
99	<LI><A href="atom-identifiers.html">5.2.1 Identifiers (Names)</a>
100	<LI><A href="atom-literals.html">5.2.2 Literals</a>
101	<LI><A href="parenthesized.html">5.2.3 Parenthesized forms</a>
102	<LI><A href="lists.html">5.2.4 List displays</a>
103	<LI><A href="genexpr.html">5.2.5 Generator expressions</a>
104	<LI><A href="dict.html">5.2.6 Dictionary displays</a>
105	<LI><A href="string-conversions.html">5.2.7 String conversions</a>
106	</ul>
107	<LI><A href="primaries.html">5.3 Primaries</a>
108	<UL>
109	<LI><A href="attribute-references.html">5.3.1 Attribute references</a>
110	<LI><A href="subscriptions.html">5.3.2 Subscriptions</a>
111	<LI><A href="slicings.html">5.3.3 Slicings</a>
112	<LI><A href="calls.html">5.3.4 Calls</a>
113	</ul>
114	<LI><A href="power.html">5.4 The power operator</a>
115	<LI><A href="unary.html">5.5 Unary arithmetic operations</a>
116	<LI><A href="binary.html">5.6 Binary arithmetic operations</a>
117	<LI><A href="shifting.html">5.7 Shifting operations</a>
118	<LI><A href="bitwise.html">5.8 Binary bit-wise operations</a>
119	<LI><A href="comparisons.html">5.9 Comparisons</a>
120	<LI><A href="Booleans.html">5.10 Boolean operations</a>
121	<LI><A href="lambdas.html">5.11 Lambdas</a>
122	<LI><A href="exprlists.html">5.12 Expression lists</a>
123	<LI><A href="evalorder.html">5.13 Evaluation order</a>
124	<LI><A href="summary.html">5.14 Summary</a>
125	</ul>
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