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  • Well, yeah: a=(1+2 3+4 5+6 7+8); for x in "${a[@]}"; do echo "Sum,C = $((C=$x))"; done. You almost never want to call out to some other process within a loop like that. And if it's not as simple as all that, you can still split out the array members with shell param expansions like for x in "${a[@]}"; do C=$((${x% *}+${x#* }))"; done. The awk stuff is way overkill. Commented Jul 2, 2015 at 11:37
  • @mikeserv Thanks. Point is that I don't always want to do sum. The sum is for a required simple demo. I can treat A and B separately to get something else, say C=A^2 and D=1-B^3. I was thinking of function statement where I can use A and B as argument $1 and $2. But I didn't try yet. :( Commented Jul 2, 2015 at 11:57
  • That's what I meant by suggesting the parameter expansions - if you set a delimiter you can divide on it. Try A=${x% *} B=${x#* }; echo "\$A=$A \$B=$B" to see what you get. Commented Jul 2, 2015 at 12:10
  • Yeah, that works, thanks. What do x% * and x#* do? Suppose, my set has three variables, i.e. {A,B,C}. Then could I have done in a similar fashion? Commented Jul 2, 2015 at 13:24
  • Yes, and no. They trim from the tail or head of a variable based on a pattern. Read this. Commented Jul 2, 2015 at 13:49