You could do it this way:
num_ids=0
for x in item.*.txt; do
echo "$x"
item_id=${x#item.}; item_id=${item_id%.txt} ## same as item_id=$(echo "$x" | cut -f2,2 -d\.) but better
echo "$item_id"
if [[ num_ids -eq 0 ]]; then
echo "$num_ids"
else
echo "not in 0"
echo "$num_ids"
fi
(( ++num_ids )) ## same as (( num_ids = num_ids + 1 ))
echo "printing again $num_ids"
done
Note: foreach x([bq]ls item.*.txt[bq])
should actually be for x in $(ls item.*.txt)
but using ls
is probably not necessary.
Your if else fi
block could also be simplified as:
echo "$item_id"
[[ num_ids -ne 0 ]] && echo "not in 0"
echo "$num_ids"