Text Constant
Whatever you have in the grid, will be exported as a string to Excel. Numeric format will be preserved, but the Excel cells will contain strings, never numbers. Those strings can't be used in formulas, for example the sum of a range containing strings with numbers will always be 0.
Syntax
Unit: VCL.TMSFNCGridBridgeCore / FMX.TMSFNCGridBridgeCore
const Text = Text;