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readarray -t V len=echo ${V[0]} sum=0 unset V[0] for a in ((a)) done result=echo "scale=3;len" | bc -l echo $result
echo ${V[0]}
echo "scale=3;
len" | bc -l
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readarray -t V len=
echo ${V[0]}sum=0 unset V[0] for a in ((a)) done result=echo "scale=3;len" | bc -lecho $result