Unused Variable Definition
^^^^^
**Definition:**

* A defined variable or in parameter is not read before it becomes undefined.

**Also Known As:**

* DU Data Flow Anomaly

**Code Example:**

.. code-block:: pseudo

  function f ( in integer i , out integer j ) {
    var integer k := 1;
    j := 1;
  }

**References:**

.. admonition:: Quality attributes

    * :octicon:`file-code;1em` -  Code Example
    * :octicon:`comment-discussion;1em` -  Cause and Effect
    * :octicon:`graph;1em` -  Frequency
    * :octicon:`sync;1em` -  Refactoring

* `An approach to quality engineering of TTCN-3 test specifications <https://link.springer.com/article/10.1007/s10009-008-0075-0>`_
* `Pattern-based Smell Detection in TTCN-3 Test Suites <http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.144.6997&rep=rep1&type=pdf>`_ :octicon:`file-code;1em` :octicon:`comment-discussion;1em` :octicon:`sync;1em`
* `Utilising Code Smells to Detect Quality Problems in TTCN-3 Test Suites <https://link.springer.com/chapter/10.1007/978-3-540-73066-8_16>`_