If
 
Purpose 
Evaluates a Boolean calculation and performs a conditional action based on that evaluation.
See also 
Format 
If [<Boolean calculation>]
Options 
<Boolean calculation> specifies the calculation you want evaluated.
Compatibility 
 
Where the script step runs 
Supported 
FileMaker Pro 
Yes 
FileMaker Server scheduled script 
Yes 
FileMaker Go 
Yes 
Custom Web Publishing 
Yes 
FileMaker WebDirect 
Yes 
Runtime solution 
Yes 
Originated in 
FileMaker Pro 6.0 or earlier
Description 
If the calculation result is any number except zero, the calculation evaluates to true and the subsequent script steps are executed. If the calculation result is zero, no data, or does not resolve into a number, then the calculation evaluates to false and the subsequent script steps are not executed.
Every If step must have a corresponding End If script step somewhere after the If step and at the same indentation. Whenever you use an If script step, the script editing pane automatically enters an End If step.
You can also add additional conditions by using the Else If script step and Else script step.
Note  If you do not specify a calculation or if the calculation is unsuccessful, it will evaluate as false. Use the Get(LastError) function to capture these errors.
Example 1 
Performs a find. If no records are found, displays all records and sorts.
Perform Find [Restore]
If [Get (FoundCount) = 0]
Show All Records
Sort Records [Restore; No dialog]
End If
Example 2 
Performs a find. If no records are found, displays a custom dialog. If records are found, sorts the found set.
Perform Find [Restore]
If [Get ( FoundCount ) = 0]
Show Custom Dialog ["Find Records"; "No records were found."]
Else
Sort Records [Restore; No dialog]
End If
Example 3 
Performs a find. If no records are found, displays a custom dialog. If one record is found, goes to the Invoice Details layout. If more than one record is found, goes to the Invoices layout.
Perform Find [Restore]
If [Get (FoundCount) = 0]
Show Custom Dialog ["Find Records"; "No record was found."]
Else If [Get (FoundCount) = 1]
Go to Layout ["Invoice Details"]
Else
Go to Layout ["Invoices"]
End If
Example 4 
Performs a find. If no records are found, displays a custom dialog so the user can run the Find Invoices script to search again. If one record is found, goes to the Invoice Details layout. If more than one record is found, goes to the Invoices layout.
Script: Find Invoices
Perform Find [ ]
If [Get ( FoundCount ) = 0]
Show Custom Dialog ["No Record Found"; "No records were found. Do you want to search again?"]
If [Get ( LastMessageChoice ) = 1]
#Calls this script again as a sub-script
Perform Script ["Find Invoices"]
Else
Show All Records
End If
Else If [Get ( FoundCount ) = 1]
Go to Layout ["Invoice Details"]
Else
Go to Layout ["Invoices"]
End If
Sort Records [Restore; No dialog]
Related topics 
Defining calculation fields
If function
If structure examples
Script steps reference (alphabetical list)
Script steps reference (category list)
About formulas