Write a shell script to arrange numbers in ascending or descending order as per the user choice

echo enter the no of element

read n1

for (( i=0; i<$n1; i++ ))

do

            echo enter `expr $i + 1` the element.

            read a[$i]

done

for (( i=0; i<$n1; i++ ))

do

            for (( j=`expr $i + 1`; j<$n1; j++ ))

            do

                        if [ ${a[$i]} -gt ${a[$j]} ]

                        then

                                    x=${a[$i]}

                                    a[$i]=${a[$j]}

                                    a[$j]=$x

                        fi

            done

done

echo 1.Ascending  2.Descending

echo enter your choice...

read c

if [ $c = 1 ]

then

            echo the ascending order is....

            for (( i=0; i<$n1; i++ ))

            do

                        echo ${a[$i]}

            done

elif [ $c = 2 ]

then

            echo the descending order is...

            for (( i=$n1; i>0; i-- ))

            do

                        echo ${a[`expr $i - 1`]}

            done

else

            echo wrong choice......

fi