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The field Difference points to the variable $(Difference). This variable was defined as the difference between two fields. I am getting this correct. I have defined the field Mod Difference as $(Difference)*-1 . That is I have multiplied by -1. I am getting different values as result. I am not able to understand why the values are totally different if multiplied by -1. Is any thing wrong with my expression?
I actually wanted to convert values to positive if the difference was negative. Is there any function to do it or do I need to resort to this expression of multiplying by -1?