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DOCUMENTATION CENTER SEARCH
Mathematica
>
Parts of Expressions
>
Built-in
Mathematica
Symbol
Levels in Expressions
Tutorials »
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Level
Head
Apply
MapAll
Position
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FreeQ
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Parts of Expressions
More About »
Heads
Heads
is an option for functions which use level specifications that specifies whether heads of expressions should be included.
MORE INFORMATION
Heads->
True
treats heads just like other elements of expressions for the purpose of levels.
Heads->
False
never includes heads as part of any level of an expression.
Most functions which use level specifications have the default setting
Heads->
False
. One exception is
Position
, for which the default is
Heads->
True
.
EXAMPLES
CLOSE ALL
Basic Examples
(1)
In[1]:=
Out[1]=
In[2]:=
Out[2]=
Scope
(2)
SEE ALSO
Level
Head
Apply
MapAll
Position
Replace
FreeQ
TUTORIALS
Levels in Expressions
MORE ABOUT
Parts of Expressions
New in 2
© 2008 Wolfram Research, Inc.
EXAMPLES
Basic Examples 
Scope 