deque::size

Returns the number of elements in the deque.

size_type size( ) const;

Return Value

The current length of the deque.

Example

// deque_size.cpp
// compile with: /EHsc
#include <deque>
#include <iostream>

int main( ) 
{
   using namespace std;
   deque <int> c1;
   deque <int>::size_type i;
   
   c1.push_back( 1 );
   i = c1.size( );
   cout << "The deque length is " << i << "." << endl;

   c1.push_back( 2 );
   i = c1.size( );
   cout << "The deque length is now " << i << "." << endl;
}

Output

The deque length is 1.
The deque length is now 2.

Requirements

Header: <deque>

Namespace: std

See Also

Concepts

deque Class

deque Class Members

deque::size and deque::resize

Standard Template Library