This is documentation for Mathematica 7, which was
based on an earlier version of the Wolfram Language.
View current documentation (Version 11.1)

NameQ

NameQ["string"]
yields True if there are any symbols whose names match the string pattern given, and yields False otherwise.
Test whether a string corresponds to a Symbol:
Test whether there are any symbols corresponding to a class of strings:
Test whether a string corresponds to a Symbol:
In[1]:=
Click for copyable input
Out[1]=
In[2]:=
Click for copyable input
Out[2]=
 
Test whether there are any symbols corresponding to a class of strings:
In[1]:=
Click for copyable input
Out[1]=
In[2]:=
Click for copyable input
Out[2]=
New in 1