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# Variables, Functions, Formulae

Variables and functions and formulae have numerous applications.
It is, for example, possible that the parametric value of a geometrical object is calculated with the help of a variable or function or formulae and then can be used for the construction.
It is also possible to save such a relation, parameter - (variable,function,formula). Any modification of the variable causes that the parameter(s) depending on it are calculated anew. And, the construction will change.

- Variables
  - General
  - Working with Variables
  - Examples
  - Variables within the Characteristics Bar
- Functions
  - SISCAD-P Functions
  - User Defined Functions
- Formulae