Create parameter
================
-The parameter definition has form *variable=expression*.
+The parameter can be defined in form *variable=expression*.
-To create parameter in the active partset or part:
+To create a parameter in the active partset or part:
#. select in the Main Menu *Part - > Parameter* item or
#. click **Parameter** button in the toolbar:
- .. image:: images/expression.png
:align: left
- defines parameter name. Name follows the naming rules of the python language for variables;
+ defines parameter name following the naming rules of the python language for variables;
-- panel **Expression** evaluates inputted manually expression as real number by python *eval()* function. In the simplest case an expression is a real number. Some standard python modules (like math) are imported by default before evaluation.
+- panel **Expression** evaluates the expression input manually as a real number by python *eval()* function. In the simplest case an expression is a real number. Some standard python modules (like math) are imported by default before evaluation.
- **Comment** contains any text. This field is optional.
-The property panel checks validity of the expression. For invalid expression **Apply** button is disabled and error message generated by python interpreter during the evaluation is shown in status bar and in popup of **Apply** button.
+The property panel checks validity of the expression. For an invalid expression **Apply** button is disabled and an error message generated by python interpreter during the evaluation is shown in the status bar and in pop-up of **Apply** button.
**TUI Command**: *model.addParameter(Part_doc, Name, Value, Comment)*
Result
------
-Created parameter and its current value are displayed in the Object Browser, in a special section **Parameters**.
+The created parameter and its current value are displayed in the Object Browser, in a special section **Parameters**.
.. image:: images/object_browser_parameter.png
:align: center
