use multiple variable with brace expression in for loop

Question

This works fine :-

for i in host{1..4} host2{1..4}
do
    echo $i
done

Now,

I have two variable likes this :-

host=host{1..4}

host2=host2{1..4}

how do i use this two variable in above loop so both work same?

something like this :-

for i in $host $host2
do
    echo $i
done

any help is appriciated

Answer 1

use eval:

$ for i in `eval echo $host $host2`;do echo $i;done
host1
host2
host3
host4
host21
host22
host23
host24