Sample Problem:
Add the values of column 2 and column 4 from a comma separated value (CSV) file.
Solution:
awk -F, '{print $2" plus "$4" is "$2+$4}' thefile.csv
Assuming thefile.csv contains
5,10,15,20
2,4,6,8
This will print out
10 plus 20 is 30
4 plus 8 is 12
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