.. _Container_Constructors:

############
Constructors
############


All :ref:`Container classes<Container>` have the same constructor defined by the length of the subsystem, **L_**.
It is possible to pass the maximal particle number, **n_max_**, for the subsystem.
Passing a small maximal particle number is useful for the :ref:`Dictionary<ContainerDict>` and the :ref:`on-the-fly<ContainerFly>` approach.
The default value of **-1** indicates the maximal possible particle number which is **L_** :math:`\cdot` (**Q**-1).


.. doxygenfunction:: danceq::internal::ContainerTable:: ContainerTable(uint64_t L_, uint64_t n_max_ = -1UL)