stepic bash students

if [[ -n "$1" && "$1" -gt "0" ]] # $1 не null и больше нуля
then

if [[ $1 -ge 5 ]] # $1 больше 5ти
then
    echo "A lot of students"
elif [[ $1 -eq 1 ]] # $1 равно 1
then
    echo "1 student"
else
    echo "$1 students"
fi

else
    echo "No students"
fi