I am trying to convert a list that contains negative values, to a list of non-negative values; inverting the negative ones. I have tried abs
but it didn't work.
My input is
x = [10,9,8,7,6,5,4,3,2,1,0,-1,-2,-3,-4,-5,-6,-7,-8,-9,-10]
How can I make it into this format as I am trying calculate the area
x = [10,9,8,7,6,5,4,3,2,1,0,1,2,3,4,5,6,7,8,9,10]
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