Adding a zero to single digit variable

Question

Trying to add a zero before the varaible if it\'s less than 10 and create said directory. I can\'t seem to get the zero to add correctly. Keeps resulting in making 02.1.20

Answer 1

You can use

$(printf %02d $i)

To generate the numbers with the format you want.

for i in $(seq 0 1 31)
do
    mkdir $path/02.$(printf %02d $i).2011
done