Shell scripting output

Question

What will be the output of the following script?

#!/in/bash

secondLoop="A B C D E F G"
counter=0

for a in 6 7 8 9
do
for b in "$secondLoop"
do
let "counter+=1"
 done
done
echo "This script has $counter iterations"​

Options:

1. This script has 28 iterations.

2. This script has 21 iterations.

3. This script has 4 iterations.

4. This script has 0 iterations.

Answer 1

It should be 4 iterations, because there are quotes in

for b in "$secondLoop"

so that the variable is expanded to a single value (that included spaces).