Stephen R. answered 10/02/17
Tutor
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Science, Computer & Math Tutor
Your formula should be
if(c11<0,abs(c11),"")
you cannot use the label of a row of cells as an identifier it must be a cell address
you cannot use value as a variable because it will be undefined
you only the if false value listed
you did not list the if true value of the absolute value of the contents of c11
as you copy this formula down the row to f 40 the value of c11 will change to that row value