About parameters

A parameter is a user-defined variable, which is used to store numbers and expressions.

For example, parameters pi and radius are defined as follows:

pi = 3.141592654

radius = 56

A third parameter circumference can be defined using parameters pi and radius:

circumference = 2*pi*radius

When you update the radius, circumference is automatically updated.

• Parameters can be used to automatically update your model when their definitions are updated. For this to work, you must create your model using relational geometry and define its objects using parameters. For example, you can define dimensional constraints on sketches using parameters.
• Parameters can be used anywhere you need to enter numbers. The names are case sensitive.
• You can create a parameter in a text box on a dialog or toolbar by typing

  param_name=expression

  where param_name is the name of the parameter and expression is an expression representing the numeric value of the parameter.