bash - Storing into variable a result of boolean expression -

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is possible continuously store result of boolean expression variable?

example

ret=0 each in acollection     executesomecommand;     # vvv compare stored value against returned value , store again     ret=$ret || $?; done; [[ ret = 0 ]] && echo "success"

the problem if $? 1, $ret still contains zero

ret=0 echo $ret # --> 0 ret=$ret || 1 echo $ret # --> 0 (should 1)

you have grouping/order of operations problem. when do

ret=$ret || 1

it first doing ret=$ret , taking result of , doing || 1 ignoring result of that. part of assignment you're doing assigning ret again.

what want $ret || 1 part , store result, need parens like

ret=$(($ret || 1))

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