RAD Studio VCL Reference
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Determines the precision used in formatting floating-point values.
property Precision: Integer;
__property int Precision;
When the aggregate field represents a floating-point value (ResultType is ftFloat or ftCurrency), use Precision to set the number of digits beyond the decimal point that appear before rounding begins. Precision affects the format of the floating-point value when it is displayed as a text string, not the actual value that is stored in the field.
The default value of Precision is 15 decimal places.
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