Reference > Functions reference > Logical functions > If
Returns either result1 or result2, depending on the value of a test.
test - any numeric value or logical expression
result1 - expression or field name
result2 - expression or field name
Parameters in braces { } are optional.
Data type returned 
text, number, date, time, timestamp, container
Originated in 
FileMaker Pro 6.0 or earlier
If test is True (any non-zero numeric result), FileMaker Pro returns result1. If test is False (0), result2 is returned. If test is False, and no result2 is supplied, If returns an empty result. Test must be an expression that returns either a numeric or Boolean (True, False) result.
If you have more than two possible results, consider using the Case function.
By default, if test refers to a field that doesn’t yet contain a value, If returns an empty result. To override this functionality, deselect the Do not evaluate if all referenced fields are empty checkbox.
If(Country = “USA”;“US Tech Support”;“International Tech Support”) returns International Tech Support, if the Country field contains France or Japan. Returns US Tech Support if the Country field contains USA.
If(State =”CA”;Subtotal * CA Tax Rate;0) returns the tax if the purchaser is a resident of California; otherwise returns 0.
Related topics 
Functions reference (category list)
Functions reference (alphabetical list)
About formulas
About functions
Defining calculation fields
Using operators in formulas