In Google Sheets, ISFORMULA is a function that checks whether a cell contains a formula.

The function takes one argument, which is the cell reference or a range of cells. If the cell(s) contain a formula, the function returns TRUE. If the cell(s) do not contain a formula, the function returns FALSE.

Here is the syntax of the ISFORMULA function: ISFORMULA(cell_reference)

For example, if you want to check whether cell A1 contains a formula, you can use the following formula: =ISFORMULA(A1)

If cell A1 contains a formula, the function will return TRUE. If cell A1 contains a value or text, the function will return FALSE.