In a separate cell, enter -1. Copy that cell

Select all the other cells to change
EditPasteSpecial
Click Multiply
OK

Clear the cell with -1 in.

--
HTH

Bob Phillips

(remove xxx from email address if mailing direct)

"RKS" wrote in message
...
I have lot of data in one column. some are positive & negative value. I
have
interchange to positive to negative & negative to positive.

RKS