What is the comparison operator used for not equal to in Excel?
You can use the Not function or the <> operator, which is
the < and the > beside each other. To see if the values in A1
and A2 are not equal to each other, you can type:
=A1<>A2
or
=Not(A1=A2)
In each case they will either give you TRUE if they are not
equal or FALSE if they are equal, in the cell that you enter the
formula into.