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Logical functions

Logical functions test for a condition to evaluate it as true or false. This is known as a Boolean value. If the condition is true, FileMaker Pro returns a 1; if the condition is false, FileMaker Pro returns a 0. You can use the keywords True and False with logical functions and operators when a Boolean value is needed. Keyword True returns 1 and keyword False returns 0.

Logical functions can also evaluate parameters such as text or arithmetic operations that do not make a true or false statement, or in the case of the GetField function, return the contents of another field.

Click a function name for details.

 

This function	Returns
Case	One of several possible results based on a series of tests.
Choose	One result value, according to the integer value of a specified test.
Evaluate	Evaluates the specified expression as a calculation.
EvaluationError	An error code, if any, from the specified expression.
ExecuteSQL	Executes a specified SQL Select statement within a FileMaker Pro database.
GetAsBoolean	1 if data converts to a non-zero numeric value; 0 if the specified data has a value of 0 or is empty.
GetField	The contents of the referenced field.
GetFieldName	The fully qualified name of a field reference.
GetLayoutObjectAttribute	The requested layout object attributes from the calculation's active window.
GetNthRecord	The contents of the referenced field from the requested record number.
If	One of two possible results depending on the value of the specified test.
IsEmpty	1 if the specified field is empty, if the related field, related table, relationship, or file is missing, or if some other error occurs; otherwise, returns 0.
IsValid	0 when a record contains an invalid value because of a field type mismatch (text in a date field, for example).
IsValidExpression	1 if the syntax of the specified expression is correct.
Let	Sets variable to the result of value for the duration of the specified expression.
Lookup	The value specified in the sourceField parameter using the relationships in the relationships graph.
LookupNext	The value specified in the sourceField parameter using the relationships in the relationships graph.
Self	The content of the object in which the calculation is defined; otherwise, returns an empty string.