Export command in shell script

Question

I very much new to shell script. I was analyzing a script where i found a line as below

ABC="$GENABC +1 +2 +3 +4 +5 +6 +7 -8" ; export ABC

I don't understand what does +1 +2 etc stands for. Kindly explain me.

I don't think it does anything. :) If you run a "export |grep ABC" it will give the same input as output — rjdkolb
– rjdkolb, Commented Dec 23, 2015 at 12:19

Etan Reisner · Accepted Answer · 2015-12-23 12:48:07Z

2

As rjdkolb indicates the + characters there are just that, literal + characters in the value of the ABC variable.

You could have seen that easily enough yourself by trying it.

As I've done, for example, at http://ideone.com/H6vMeg

$ GENABC="original value"
$ ABC="$GENABC +1 +2 +3 +4 +5 +6 +7 -8" ; export ABC
$ declare -p ABC
declare -x ABC="original value +1 +2 +3 +4 +5 +6 +7 -8"

answered Dec 23, 2015 at 12:48

Etan Reisner

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