Language and Conventions Overview

Expressions

Expressions are used to manipulate variables with mathematical functions. An expression can add two strings together, subtract several numerical values and/or variables, or set one array equal to another, etc. Expressions may be used in place of simple variables or constants.

For example, an arithmetic expression could be used to create a horizontal line 2 inches long from a specified point:

ENTITY/LN1
LN1=LINE/X,Y,X+2,Y

The line would begin at the specified X and Y and end at X+2 and Y. X+2 is an arithmetic expression.

These expressions are evaluated before the statement containing them is executed.

The three types of expressions are:

•  Arithmetic

•  Array

•  String