stl:list:empty

C++ Reference

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empty

Syntax:

    #include <list>
    bool empty() const;

The empty() function returns true if the list has no elements, false otherwise. For example, the following code uses empty() as the stopping condition on a while loop to clear a list and display its contents in reverse order:

   vector<int> v;
   for( int i = 0; i < 5; i++ ) {
     v.push_back(i);
   }
   while( !v.empty() ) {
     cout << v.back() << endl;
     v.pop_back();
   }