Absolute value in awk doesn't work?

Question

I want to select line of a file where the absolute value of column 9 is less than 500. Column is sometimes positive, sometimes negative.

awk -F\'\\t\' \'{ if         


        

Answer 1

awk -F'\t' 'function abs(x){return ((x < 0.0) ? -x : x)} {if (abs($9) < 500) print $0}'