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std::basic_string::empty(3)    C++ Standard Libary   std::basic_string::empty(3)

NAME
     std::basic_string::empty - std::basic_string::empty

Synopsis
	bool empty() const;  (noexcept since C++11)
			     (constexpr since C++20)

	Checks if the string has no characters, i.e. whether begin() == end().

Parameters
	(none)

Return value
	true if the string is empty, false otherwise

Complexity
	Constant.

Example
     // Run this code

      #include <iostream>
      #include <string>

      int main()
      {
	  std::string s;
	  std::boolalpha(std::cout);
	  std::cout << "s.empty():" << s.empty() << "\t s:'" << s << "'\n";

	  s = "Exemplar";
	  std::cout << "s.empty():" << s.empty() << "\t s:'" << s << "'\n";

	  s = "";
	  std::cout << "s.empty():" << s.empty() << "\t s:'" << s << "'\n";
      }

Output:
      s.empty():true   s:''
      s.empty():false  s:'Exemplar'
      s.empty():true   s:''

See also
	size	 returns the number of characters
	length	 (public member function)
	max_size returns the maximum number of characters
		 (public member function)
		 returns  the number of characters that can be held in currently
     allocated
	capacity storage
		 (public member function)
	size
	ssize	 returns the size of a container or array
	(C++17)  (function template)
	(C++20)
	empty	 checks whether the container is empty
	(C++17)  (function template)
	empty	 checks whether the view is empty
		 (public	member	      function	      of	std::ba-
     sic_string_view<CharT,Traits>)

http://cppreference.com 	   2024.06.10	     std::basic_string::empty(3)
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