shell for if

#!/bin/bash


for i in {26..31}
do
        if [ ${i} -lt 10 ];then
                j=2017040"${i}"
        else
                j=201704"${i}"
        fi
echo $j >> venn.log
echo 'date -d' >> venn.log
./calc_bkr_media_detail_rerun.sh $j

done