Filter parameter space character

#!/bin/bash
[[ -n "$*" ]] && {

    for((i=1;i<="$#;"i++))

    do

        echo "${!i}"

    done

} || {

    echo 'Empty argument !'

}

#bash test.sh 1 2 3 "4 5" 6 "7 8"

1
2
3
4 5
6
7 8