Function Repository Resource:

ValidSymbolIdentifierQ

Check whether a string is a valid symbol name

Contributed by: Brenton Bostick

ResourceFunction["ValidSymbolIdentifierQ"]["string"]

returns True if the string is a valid symbol identifier and returns False otherwise.

Details

ResourceFunction["ValidSymbolIdentifierQ"] does not generate any messages.

ResourceFunction["ValidSymbolIdentifierQ"] does not create new symbols.

Check whether "x" is a valid symbol name:

In[1]:=

Out[1]=

Check a string number:

In[2]:=

Out[2]=

Symbols can not start with numbers:

In[3]:=

Out[3]=

Number characters can be later in the symbol:

In[4]:=

Out[4]=

Characters besides letters and digits are not valid in symbols:

In[5]:=

Out[5]=

Spaces are invalid:

In[6]:=

Out[6]=