getarguments.sh

if [ $# -gt 0 ]; then
    echo "Your command line contains $# arguments."
else
    echo "Your command line contains no arguments."
fi

if [ "$1" != "" ]; then
    echo "Positional parameter 1 contains something."
else
    echo "Positional parameter 1 is empty."
fi

processDirectory="${1:-$PWD}"
echo "The ${processDirectory} directory will be processed."

cd ${processDirectory}
echo "\$PWD is" $PWD "directory."