Data Types
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In modeling tools that support both classical and quantum paradigms, data types are used to represent information. 

Classical data types can include a value, an output identifier and an optional size. If the size is specified, it must be greater than zero and is used directly. If no size is given, it is considered machine-dependent and resolved by the backend.

.. figure:: images/classicalDataTypes.png
   :alt: Classical Data Types
   :align: center
   :width: 80%

   Classical data types used in the modeling tool.

Quantum data types, such as ancillae, are always initialized in the :math:`\ket{0}` state and do not require an explicit value. Both classical and quantum data types serve as source elements in the model. They do not have input ports but provide a single output port to connect their data or state to subsequent elements.

.. figure:: images/quantumDataTypes.png
   :alt: Quantum Data Types
   :align: center
   :width: 80%

   Quantum data types used in the modeling tool.