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There is something wrong with my code in MS Excel. If I put "X" in any cell from A1:C10 the value of the D1 will be 1 if not the value will be blank. but there's an error (#VALUE!). Please help me.
Excel is pretty literal and what you are asking it to do, does Range A1:c10 = "X", is not valid. You want to replace
A1:C10="X"
with
COUNTIF(a1:c10,"X")>0
i.e.:
=IF(COUNTIF(A1:C10,"X")>0,"1","")
One of the many valid ways to accomplish what you are looking to do is to COUNTIF([range],[condition]) and then check if that returns >0.