Size of array A is 10 while size of B is 30. Scan 10 integers in both the array and concat array A to B. Then apply sorting algorithm according to the user choice

clear

echo enter the elements for array A..

for (( i=0; i<10; i++ ))

do

            echo enter `expr $i + 1` element.

            read a[$i]

done

echo enter the elements for array B..

for (( j=0; j<10; j++ ))

do

            echo enter `expr $j + 1` element.

            read b[$j]

done

for (( k=10; k<20; k++ ))

do

            z=`expr $k - 10`

            b[$k]=${a[$z]}

done

for (( i=0; i<20; i++ ))

do

            for (( j=`expr $i + 1`; j<20; j++ ))

            do

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

                        then

                                    x=${b[$i]}

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

                                    b[$j]=$x

                        fi

            done

done

clear

echo 1.Ascending  2.Descending

echo enter your choice...

read c

if [ $c = 1 ]

then

            echo the ascending order is....

            for (( i=0; i<20; i++ ))

            do

                        echo ${b[$i]}

            done

elif [ $c = 2 ]

then

            echo the descending order is...

            for (( i=20; i>0; i-- ))

            do

                        echo ${b[$i]}

            done

else

            echo wrong choice......

fi