Handy bash function

Handy function that I found at http://www.steve.org.uk/Reference/shell.html:

function range () { 
    if [ $1 -ge $2 ]; then
        return
    fi
    a=$1
    b=$2
    while [ $a -le $b ]; do
        echo $a;
        a=$(($a+1));
    done
}