Leading Zeros For Numbers Below 10

When displaying in a time format, it’s best to display numbers below 10 with leading zeros.

Here’s a nice function you can call to covert numbers below 10.

<pre lang="bash">
convert ()
{
    # print the number as a string with a leading zero
    number=$(printf '%02d\n' "$1")
    echo $number
}
convert 5

Result

<pre lang="bash">
05