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C++ Keywords [C++ Reference]
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<h1><a name="c_keywords" id="c_keywords">C++ Keywords</a></h1>
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<p>
This is a list of reserved keywords in C++. Since they are used by the language, these keywords are not
available for re-definition (or overloading) by programmers.
</p>
<table class="inline">
<tr class="row0">
<th class="col0">Keyword</th><th class="col1">Description</th>
</tr>
<tr class="row1">
<td class="col0"><a href="../alternative_operators.html" class="wikilink1" title="alternative_operators">and</a></td><td class="col1">alternative to && operator</td>
</tr>
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<td class="col0"><a href="../alternative_operators.html" class="wikilink1" title="alternative_operators">and_eq</a></td><td class="col1">alternative to &= operator</td>
</tr>
<tr class="row3">
<td class="col0"><a href="../keywords/asm.html" class="wikilink1" title="keywords:asm">asm</a></td><td class="col1">insert an assembly instruction</td>
</tr>
<tr class="row4">
<td class="col0"><a href="../keywords/auto.html" class="wikilink1" title="keywords:auto">auto</a></td><td class="col1">declare a local variable</td>
</tr>
<tr class="row5">
<td class="col0"><a href="../alternative_operators.html" class="wikilink1" title="alternative_operators">bitand</a></td><td class="col1">alternative to bitwise & operator</td>
</tr>
<tr class="row6">
<td class="col0"><a href="../alternative_operators.html" class="wikilink1" title="alternative_operators">bitor</a></td><td class="col1">alternative to | operator</td>
</tr>
<tr class="row7">
<td class="col0"><a href="../keywords/bool.html" class="wikilink1" title="keywords:bool">bool</a></td><td class="col1">declare a boolean variable</td>
</tr>
<tr class="row8">
<td class="col0"><a href="../keywords/break.html" class="wikilink1" title="keywords:break">break</a></td><td class="col1">break out of a loop</td>
</tr>
<tr class="row9">
<td class="col0"><a href="../keywords/case.html" class="wikilink1" title="keywords:case">case</a></td><td class="col1">a block of code in a switch statement</td>
</tr>
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<td class="col0"><a href="../keywords/catch.html" class="wikilink1" title="keywords:catch">catch</a></td><td class="col1">handles exceptions from throw</td>
</tr>
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<td class="col0"><a href="../keywords/char.html" class="wikilink1" title="keywords:char">char</a></td><td class="col1">declare a character variable</td>
</tr>
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<td class="col0"><a href="../keywords/class.html" class="wikilink1" title="keywords:class">class</a></td><td class="col1">declare a class</td>
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<tr class="row13">
<td class="col0"><a href="../alternative_operators.html" class="wikilink1" title="alternative_operators">compl</a></td><td class="col1">alternative to ~ operator</td>
</tr>
<tr class="row14">
<td class="col0"><a href="../keywords/const.html" class="wikilink1" title="keywords:const">const</a></td><td class="col1">declare immutable data or functions that do not change data</td>
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<tr class="row15">
<td class="col0"><a href="../keywords/const_cast.html" class="wikilink1" title="keywords:const_cast">const_cast</a></td><td class="col1">cast from const variables</td>
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<tr class="row16">
<td class="col0"><a href="../keywords/continue.html" class="wikilink1" title="keywords:continue">continue</a></td><td class="col1">bypass iterations of a loop</td>
</tr>
<tr class="row17">
<td class="col0"><a href="../keywords/default.html" class="wikilink1" title="keywords:default">default</a></td><td class="col1">default handler in a case statement</td>
</tr>
<tr class="row18">
<td class="col0"><a href="../keywords/delete.html" class="wikilink1" title="keywords:delete">delete</a></td><td class="col1">make dynamic memory available</td>
</tr>
<tr class="row19">
<td class="col0"><a href="../keywords/do.html" class="wikilink1" title="keywords:do">do</a></td><td class="col1">looping construct</td>
</tr>
<tr class="row20">
<td class="col0"><a href="../keywords/double.html" class="wikilink1" title="keywords:double">double</a></td><td class="col1">declare a double precision floating-point variable</td>
</tr>
<tr class="row21">
<td class="col0"><a href="../keywords/dynamic_cast.html" class="wikilink1" title="keywords:dynamic_cast">dynamic_cast</a></td><td class="col1">perform runtime casts</td>
</tr>
<tr class="row22">
<td class="col0"><a href="../keywords/else.html" class="wikilink1" title="keywords:else">else</a></td><td class="col1">alternate case for an if statement</td>
</tr>
<tr class="row23">
<td class="col0"><a href="../keywords/enum.html" class="wikilink1" title="keywords:enum">enum</a></td><td class="col1">create enumeration types</td>
</tr>
<tr class="row24">
<td class="col0"><a href="../keywords/explicit.html" class="wikilink1" title="keywords:explicit">explicit</a></td><td class="col1">only use constructors when they exactly match</td>
</tr>
<tr class="row25">
<td class="col0"><a href="../keywords/export.html" class="wikilink1" title="keywords:export">export</a></td><td class="col1">allows template definitions to be separated from their declarations</td>
</tr>
<tr class="row26">
<td class="col0"><a href="../keywords/extern.html" class="wikilink1" title="keywords:extern">extern</a></td><td class="col1">tell the compiler about variables defined elsewhere</td>
</tr>
<tr class="row27">
<td class="col0"><a href="../keywords/false.html" class="wikilink1" title="keywords:false">false</a></td><td class="col1">a constant representing the boolean false value</td>
</tr>
<tr class="row28">
<td class="col0"><a href="../keywords/float.html" class="wikilink1" title="keywords:float">float</a></td><td class="col1">declare a floating-point variable</td>
</tr>
<tr class="row29">
<td class="col0"><a href="../keywords/for.html" class="wikilink1" title="keywords:for">for</a></td><td class="col1">looping construct</td>
</tr>
<tr class="row30">
<td class="col0"><a href="../keywords/friend.html" class="wikilink1" title="keywords:friend">friend</a></td><td class="col1">grant non-member function access to private data</td>
</tr>
<tr class="row31">
<td class="col0"><a href="../keywords/goto.html" class="wikilink1" title="keywords:goto">goto</a></td><td class="col1">jump to a different part of the program</td>
</tr>
<tr class="row32">
<td class="col0"><a href="../keywords/if.html" class="wikilink1" title="keywords:if">if</a></td><td class="col1">execute code based on the result of a test</td>
</tr>
<tr class="row33">
<td class="col0"><a href="../keywords/inline.html" class="wikilink1" title="keywords:inline">inline</a></td><td class="col1">optimize calls to short functions</td>
</tr>
<tr class="row34">
<td class="col0"><a href="../keywords/int.html" class="wikilink1" title="keywords:int">int</a></td><td class="col1">declare an integer variable</td>
</tr>
<tr class="row35">
<td class="col0"><a href="../keywords/long.html" class="wikilink1" title="keywords:long">long</a></td><td class="col1">declare a long integer variable</td>
</tr>
<tr class="row36">
<td class="col0"><a href="../keywords/mutable.html" class="wikilink1" title="keywords:mutable">mutable</a></td><td class="col1">override a const variable</td>
</tr>
<tr class="row37">
<td class="col0"><a href="../keywords/namespace.html" class="wikilink1" title="keywords:namespace">namespace</a></td><td class="col1">partition the global namespace by defining a scope</td>
</tr>
<tr class="row38">
<td class="col0"><a href="../keywords/new.html" class="wikilink1" title="keywords:new">new</a></td><td class="col1">allocate dynamic memory for a new variable</td>
</tr>
<tr class="row39">
<td class="col0"><a href="../alternative_operators.html" class="wikilink1" title="alternative_operators">not</a></td><td class="col1">alternative to ! operator</td>
</tr>
<tr class="row40">
<td class="col0"><a href="../alternative_operators.html" class="wikilink1" title="alternative_operators">not_eq</a></td><td class="col1">alternative to != operator</td>
</tr>
<tr class="row41">
<td class="col0"><a href="../keywords/operator.html" class="wikilink1" title="keywords:operator">operator</a></td><td class="col1">create overloaded operator functions</td>
</tr>
<tr class="row42">
<td class="col0"><a href="../alternative_operators.html" class="wikilink1" title="alternative_operators">or</a></td><td class="col1">alternative to || operator</td>
</tr>
<tr class="row43">
<td class="col0"><a href="../alternative_operators.html" class="wikilink1" title="alternative_operators">or_eq</a></td><td class="col1">alternative to |= operator</td>
</tr>
<tr class="row44">
<td class="col0"><a href="../keywords/private.html" class="wikilink1" title="keywords:private">private</a></td><td class="col1">declare private members of a class</td>
</tr>
<tr class="row45">
<td class="col0"><a href="../keywords/protected.html" class="wikilink1" title="keywords:protected">protected</a></td><td class="col1">declare protected members of a class</td>
</tr>
<tr class="row46">
<td class="col0"><a href="../keywords/public.html" class="wikilink1" title="keywords:public">public</a></td><td class="col1">declare public members of a class</td>
</tr>
<tr class="row47">
<td class="col0"><a href="../keywords/register.html" class="wikilink1" title="keywords:register">register</a></td><td class="col1">request that a variable be optimized for speed</td>
</tr>
<tr class="row48">
<td class="col0"><a href="../keywords/reinterpret_cast.html" class="wikilink1" title="keywords:reinterpret_cast">reinterpret_cast</a></td><td class="col1">change the type of a variable</td>
</tr>
<tr class="row49">
<td class="col0"><a href="../keywords/return.html" class="wikilink1" title="keywords:return">return</a></td><td class="col1">return from a function</td>
</tr>
<tr class="row50">
<td class="col0"><a href="../keywords/short.html" class="wikilink1" title="keywords:short">short</a></td><td class="col1">declare a short integer variable</td>
</tr>
<tr class="row51">
<td class="col0"><a href="../keywords/signed.html" class="wikilink1" title="keywords:signed">signed</a></td><td class="col1">modify variable type declarations</td>
</tr>
<tr class="row52">
<td class="col0"><a href="../keywords/sizeof.html" class="wikilink1" title="keywords:sizeof">sizeof</a></td><td class="col1">return the size of a variable or type</td>
</tr>
<tr class="row53">
<td class="col0"><a href="../keywords/static.html" class="wikilink1" title="keywords:static">static</a></td><td class="col1">create permanent storage for a variable</td>
</tr>
<tr class="row54">
<td class="col0"><a href="../keywords/static_cast.html" class="wikilink1" title="keywords:static_cast">static_cast</a></td><td class="col1">perform a nonpolymorphic cast</td>
</tr>
<tr class="row55">
<td class="col0"><a href="../keywords/struct.html" class="wikilink1" title="keywords:struct">struct</a></td><td class="col1">define a new structure</td>
</tr>
<tr class="row56">
<td class="col0"><a href="../keywords/switch.html" class="wikilink1" title="keywords:switch">switch</a></td><td class="col1">execute code based on different possible values for a variable</td>
</tr>
<tr class="row57">
<td class="col0"><a href="../keywords/template.html" class="wikilink1" title="keywords:template">template</a></td><td class="col1">create generic functions</td>
</tr>
<tr class="row58">
<td class="col0"><a href="../keywords/this.html" class="wikilink1" title="keywords:this">this</a></td><td class="col1">a pointer to the current object</td>
</tr>
<tr class="row59">
<td class="col0"><a href="../keywords/throw.html" class="wikilink1" title="keywords:throw">throw</a></td><td class="col1">throws an exception</td>
</tr>
<tr class="row60">
<td class="col0"><a href="../keywords/true.html" class="wikilink1" title="keywords:true">true</a></td><td class="col1">a constant representing the boolean true value</td>
</tr>
<tr class="row61">
<td class="col0"><a href="../keywords/try.html" class="wikilink1" title="keywords:try">try</a></td><td class="col1">execute code that can throw an exception</td>
</tr>
<tr class="row62">
<td class="col0"><a href="../keywords/typedef.html" class="wikilink1" title="keywords:typedef">typedef</a></td><td class="col1">create a new type name from an existing type</td>
</tr>
<tr class="row63">
<td class="col0"><a href="../keywords/typeid.html" class="wikilink1" title="keywords:typeid">typeid</a></td><td class="col1">describes an object</td>
</tr>
<tr class="row64">
<td class="col0"><a href="../keywords/typename.html" class="wikilink1" title="keywords:typename">typename</a></td><td class="col1">declare a class or undefined type</td>
</tr>
<tr class="row65">
<td class="col0"><a href="../keywords/union.html" class="wikilink1" title="keywords:union">union</a></td><td class="col1">a structure that assigns multiple variables to the same memory location</td>
</tr>
<tr class="row66">
<td class="col0"><a href="../keywords/unsigned.html" class="wikilink1" title="keywords:unsigned">unsigned</a></td><td class="col1">declare an unsigned integer variable</td>
</tr>
<tr class="row67">
<td class="col0"><a href="../keywords/using.html" class="wikilink1" title="keywords:using">using</a></td><td class="col1">import complete or partial namespaces into the current scope</td>
</tr>
<tr class="row68">
<td class="col0"><a href="../keywords/virtual.html" class="wikilink1" title="keywords:virtual">virtual</a></td><td class="col1">create a function that can be overridden by a derived class</td>
</tr>
<tr class="row69">
<td class="col0"><a href="../keywords/void.html" class="wikilink1" title="keywords:void">void</a></td><td class="col1">declare functions or data with no associated data type</td>
</tr>
<tr class="row70">
<td class="col0"><a href="../keywords/volatile.html" class="wikilink1" title="keywords:volatile">volatile</a></td><td class="col1">warn the compiler about variables that can be modified unexpectedly</td>
</tr>
<tr class="row71">
<td class="col0"><a href="../keywords/wchar_t.html" class="wikilink1" title="keywords:wchar_t">wchar_t</a></td><td class="col1">declare a wide-character variable</td>
</tr>
<tr class="row72">
<td class="col0"><a href="../keywords/while.html" class="wikilink1" title="keywords:while">while</a></td><td class="col1">looping construct</td>
</tr>
<tr class="row73">
<td class="col0"><a href="../alternative_operators.html" class="wikilink1" title="alternative_operators">xor</a></td><td class="col1">alternative to ^ operator</td>
</tr>
<tr class="row74">
<td class="col0"><a href="../alternative_operators.html" class="wikilink1" title="alternative_operators">xor_eq</a></td><td class="col1">alternative to ^= operator</td>
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