Expressions

An expression is a combination of one or more specifications that represents a single value. The following specifications can be used inside an expression:

Item

Description

Expression that results in true or false. Conditions can be used inside constructions with the IF...ENDIF command.

Literal value (string), specified between single quotes ('<literal>').

If a literal should contain a quote, this has to be specified as two quotes.

Examples:


Specification:	Evaluation:
'208'	208
''''	A single quote (')
'''	Invalid as a literal

Specification to point to a certain data element, build up as follows:

[<Object>.]<Field>

Numeric value, which may contain a sign and/or decimals.

Combination of operands and operators that returns a single value. The operands may be literals, field specifications, numeric
values or nested operations. Nested operations are specified between parentheses. The result of a nested operation is used
as an operand in the operation in which it is nested.

Example:

var1 := (var2 * var3) + 200
// (var2 * var3) is the nested expression, that is executed first.
// Next, the result value for that expression is used as an operand
// in the expression "<Result> + 200"