Livecycle

About expressions

Literals, operators, comments, keywords, identifiers, line terminators, and white space come together to form a list of expressions, even if the list only contains a single expression. In general, each expression in the list resolves to a value, and the value of the list as a whole is the value of the last expression in the list.

For example, consider the following scenario of two fields on a form design:

 

Field name	Calculations	Returns
Field1	5 + Abs(Price) “Hello World” 10 * 3 + 5 * 4	50
Field2	10 * 3 + 5 * 4	50

The value of both Field1 and Field2 after the evaluation of each field’s expression list is 50.

FormCalc divides the various types of expressions that make up an expression list into the following categories:

•

“Simple”

•	“Assignment”

•	“Logical OR”

•	“Logical AND”

•

“Unary”

•	“Equality and inequality”

•	“Relational”

•	“If expressions”

•	“While expressions”

•	“For expressions”

•	“Foreach expressions”

•	“Break expressions”

•	“Continue expressions”

About expressions