ISFORMULA

ISFORMULA(reference)

Returns the value True or False depending if the cell contains a formula.

reference

A cell or range reference.

REMARKS

* This function was added in Excel 2013.
* If "reference" is not valid, then #VALUE is returned.
* You can quickly switch between displaying the values and the formulas using the shortcut key (Ctrl + ').
* You can use the FORMULATEXT function to return the formula from a particular cell.
* You can use the ISREF function to return True or False depending if the value is a cell reference.
* For the Microsoft documentation refer to support.microsoft.com
* For the Google documentation refer to support.google.com

	A	B
1	=ISFORMULA(B1) = -1	=10+10 = 20
2	=ISFORMULA(B2) = -1	=NA() = #N/A
3	=ISFORMULA(B3) = -1	=100 = 100
4	=ISFORMULA(B4) = 0	some text

1 - Is the entry in cell "B1" a formula.
2 - Is the entry in cell "B2" a formula.
3 - Is the entry in cell "B3" a formula.
4 - Is the entry in cell "B3" a formula.