For the standard specialization of char the function returns "true".
For the standard specialization of wchar_t the function returns L"true".
During its operation, the version of this function in the generic template simply calls the virtual protected member do_truename, which is the member function in charge of performing the actions described above.
Return valueThe string used to represent the boolean value true.
string_type is a member alias of basic_string<charT>, where charT is the template parameter (i.e., the facet's character type).
2+2=4 is true
|numpunct::falsename||Return string representing false (public member function)|
|boolalpha||Alphanumerical bool values (manipulator function)|