empty [C++ Reference]
Keywords: stl,vector,empty
Date: 2009-08-28T11:18:38-0700

[[empty]]
C++ Reference
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## empty

Syntax:

        #include <vector>
        bool empty() const;

The empty() function returns true if the vector has no elements, false otherwise.

For example, the following code uses empty() as the stopping condition on a while loop to clear a vector 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();
        }

Related Topics: size push_back pop_back

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