read line by line using `for` loop

Question

How can I read line by line using for loop?

what I've tried:

hh=$(echo -e "\n1\n2\n3\n4\n")

IFS=$'\n';

for r in "$hh"; do echo $r; done
1 2 3 4

echo -e "$hh"

1
2
3
4

Answer 1

Use a while loop:

$ while read -r r; do echo $r; done <<< "$hh"

1
2
3
4

Answer 2

The correct answer is, you don't read line-by-line with a for loop. Use a while loop instead with the read builtin:

while IFS= read -r line; do
    echo "$line"
done <<< "$hh"