Cell functions are functions that you can use in the cells of a form to change values within the cells.
Addition
add<number> adds the value <number> to the current number in the cell
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Intermediate step:
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Subtraction
sub<number> subtracts from the current number in the cell the value <number>
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Intermediate step:
After:
Add percent
add<number>% increases the cell value by <number>%
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Intermediate step:
After:
Subtract percent
sub<number>% reduces the cell value by <number>%
Before:
Intermediate step:
After: