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Unique
Unique[
] generates a new symbol, whose name is of the form $
nnn.
Unique[
x
] generates a new symbol, with a name of the form x
$
nnn.
Unique[
x
,
y
, ... 
] generates a list of new symbols.
Unique["
xxx
"] generates a new symbol, with a name of the form xxxnnn.
Unique[
x
] numbers the symbols it creates using $ModuleNumber, and increments $ModuleNumber every time it is called.
Unique["
xxx
"] numbers the symbols it creates sequentially, starting at 1 for each string xxx.
Unique[
name
,
,
, ... 
] generates a symbol which has the attributes  .
See the Mathematica book: Section 2.6.3.
See also: Symbol, ToExpression, Names, C, Module, CharacterRange.
Further Examples
Here are several examples of new symbols generated using Unique.
In[1]:= 
Out[1]= 
In[2]:= 
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In[3]:= 
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