POSIX sh syntax for for-loops [SC2039]

Question

The following command works well on my shell :

for ((j=0; j<=24; j++))
do > $j.json
done

but having the following notification :

SC2039 In POSIX sh, arithmetic for loops are undefined.

I was wondering what would be the equivalent in POSIX in order not to have interpeting issues on other systems.

Answer 1

I guess the standards-compliant way of doing it would be something like this:

j=0
while [ $j -le 24 ]; do
    true > "$j.json"
    j=$(( j + 1 ))
done

Answer 2

Another way that should work in a POSIX shell:

for j in `seq 0 24`; do
    ...
done