12.3.1                  Numbers and variables

All the parameters of Elements (Ports) and the coordinates used in NEWLINE, ADDLINE must belong to one of the following categories:

·       Numbers (or strings where a string is expected as a parameter)

·       Object parameters as declared in PAR or PARL declaration

·       Variables which are declared by their first appearance at the left side of a substitution equation with a number or expression at the right side, like for example “k=5;” or “k=2*n+1”. The type of the variable is assigned automatically by the UDO interpreter.

·       Values of READF function

·       Expressions composed of items belonging to the above categories and the following operators and mathematical functions.

Go to next Operators and logical conditions chapter.

Back to Syntax of the User Defined Object (UDO) language chapter.