Set Field
Purpose 
Replaces the entire contents of the specified field in the current record with the result of a calculation.
Format 
Set Field [<table::field>; <value or formula>]
Options 
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Select Specify target field or click Specify to specify the field whose contents you want to replace. If no field is specified and a field is selected in Browse mode or Find mode, that field is used.
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For Calculated result, click Specify to define the calculation. In the Specify Calculation dialog box, type the calculation you want evaluated, or use the field list (on the left) and the functions list (on the right) with the mathematical and text operators to build the calculation.
Compatibility 
This script step is also supported in web publishing and in a FileMaker Server scheduled script.
Description 
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The result of the calculation must match the field type. For example, you can't assign a date calculation to a container field.
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The specified field doesn’t have to be on the current layout.
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If the result of the calculation doesn’t match the target field type, and the validate option for the field is set to Always, the field will not be set and an error code is returned (which can be captured with the Get(LastError) function).
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When possible, the Set Field script step makes the record active and leaves it active until the record is exited or committed. Scripts that use a series of Set Field script steps should group these steps together if possible, so that subsequent Set Field script steps can act on the record without having to lock the record, download and upload data, index the field, and so on, after each individual Set Field script step. These functions and record level validation are performed after the record has been exited or committed.
Examples 
The following example calculates 7 percent of the Salary field and assigns the result to the field SDI. Note that Set Field works whether or not the field is on the active layout.
Set Field [Table1::SDI; Salary * .07]
Related topics 
Defining calculation fields
Script steps reference (alphabetical list)
Script steps reference (category list)
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