Bash: Homework FAIL

hw_fail.sh

#!/bin/bash

if [ $# -eq 0 ]; then
    echo "Error!";
else
    for arg in $@; do
        if [ $arg == "name" ]; then
            echo "yaska";
        elif [ $arg == "time" ]; then
            echo `date +"%S:%M:%H %m.%d.%Y"`;
        elif [ $arg == "nfile" ]; then
            echo $((`ls | wc -l` + 10));
        elif [ $arg == "ndirs" ]; then
            echo $((`ls -d */ | wc -l` + 10));
        else
            echo "";
        fi;
    done;
fi;